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Interconnection Agreement [Amendment] - Southwestern Bell Telephone Co. and Birch Telecom of Kansas Inc.

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                                    AMENDMENT

                          TO INTERCONNECTION AGREEMENT

                                     BETWEEN

                       SOUTHWESTERN BELL TELEPHONE COMPANY

                                       AND

                          BIRCH TELECOM OF KANSAS, INC.


      The Interconnection Agreement ("the Agreement") effective October 18,
2000, by and between Southwestern Bell Telephone Company ("SWBT") and Birch
Telecom of Kansas, Inc. ("CLEC") (jointly referred to as "the Parties"), shall
be amended as follows:

      (1)    The Parties hereby amend the Agreement to add an Amended Appendix
Pricing, which is attached hereto as Exhibit "A" and incorporated herein by
reference, to incorporate certain rates, terms and/or conditions into this
Interconnection Agreement which reflects certain rates, terms and/or conditions
established by the Kansas Corporation Commission ("KCC") in Docket No.
97-SCCC-149-GIT to replace certain rates designated as "interim" in the
Agreement. SWBT will calculate and apply to CLEC's bill any applicable credits
or charges due CLEC consistent with the KCC's December 21, 2000 Decision in
Docket No. 97-SCCC-149-GIT. This Amended Appendix Pricing shall supersede all of
the rates designated as "interim" in the Agreement and any and all references to
interim rates in the Agreement shall be deleted from such Agreement by way of
this Amendment.

      (2)    The Parties acknowledge and agree that in the event that any of the
rates, terms and/or conditions herein, or any of the laws or regulations that
were the basis or rationale for such rates, terms and/or conditions in the
Agreement, are invalidated, modified or stayed by any action of any state or
federal regulatory or legislative bodies or courts of competent jurisdiction,
including but not limited to any decision by the Eighth Circuit relating to any
of the costing/pricing rules adopted by the FCC in its First Report and Order,
IN RE: IMPLEMENTATION OF THE LOCAL COMPETITION PROVISIONS IN THE
TELECOMMUNICATIONS ACT OF 1996, 11 FCC Rcd 15499 (1996)(e.g., Section 51.501, et
seq.), upon review and remand from the United States Supreme Court,

<Page>

in AT&T CORP. V. IOWA UTILITIES BD., 119 S. Ct. 721 (1999) or AMERITECH V. FCC,
No. 98-1381, 1999 WL 116994, 1999 Lexis 3671 (June 1, 1999), the affected
provision shall be immediately invalidated, modified, or stayed, consistent with
the action of the legislative body, court, or regulatory agency upon the written
request of either Party. In such event, the Parties shall expend diligent
efforts to arrive at an agreement regarding the appropriate conforming
modifications to the Agreement. If negotiations fail, disputes between the
Parties concerning the interpretation of the actions required or provisions
affected by such governmental actions shall be resolved pursuant to the dispute
resolution process provided for in this Agreement. The Parties acknowledge and
agree that by executing this Amendment, neither Party waives any of its rights,
remedies, or arguments with respect to such decisions and any remand thereof,
including its right to seek legal review or a stay pending appeal of such
decisions or its rights under this paragraph and the Intervening Law language in
the Agreement.

      (3)    This Amendment shall not modify or extend the Effective Date or
Term of the underlying Agreement, but rather, shall be coterminous with such
Agreement.

      EXCEPT AS MODIFIED HEREIN, ALL OTHER TERMS AND CONDITIONS IN THE
UNDERLYING AGREEMENT REMAIN UNCHANGED, and all such terms and conditions are
hereby incorporated by reference and the Parties hereby reaffirm the terms and
provisions thereof.

                                       2
<Page>

      This Amendment to Interconnection Agreement was exchanged in triplicate on
this ______ day of _______________________________, 2001, by SWBT, signing by
and through its duly authorized representative, and CLEC, signing by and through
its duly authorized representative.

BIRCH TELECOM OF KANSAS, INC.             *SOUTHWESTERN BELL TELEPHONE
COMPANY
                                          BY: SBC TELECOMMUNICATIONS, INC.,
                                          ITS AUTHORIZED AGENT

Signature: /s/ JOHN IVANUSKA              Signature: /S/ O.R. STANLEY
          ------------------------------            ---------------------------
Name: JOHN IVANUSKA                       Name: O.R. STANLEY
     -----------------------------------      ---------------------------------
(Print or Type)

Title: VP-Regulatory & Carrier Relations  Title:  PRESIDENT-INDUSTRY MARKETS
      ----------------------------------        -------------------------------
(Print or Type)

Date: 3/28/01                             Date: March 26, 2001
     -----------------------------------       --------------------------------

AECN/OCN # 8856
           -----------------------------
(Facility Based - if applicable)

*On January 25, 1999, the United States Supreme Court issued its opinion in AT&T
CORP. V. IOWA UTILITIES BOARD, 119 S. Ct. 721 (1999) and on June 1, 1999, the
United States Supreme Court issued its opinion in AMERITECH V. FCC, No. 98-1381,
1999 WL 116994, 1999 Lexis 3671 (June 1, 1999). In addition, on November 5,
1999, the FCC issued its Third Report and Order and Fourth Further Notice of
Proposed Rulemaking in CC Docket No. 96-96 (FCC 99-238), including the FCC's
Supplemental Order issued IN THE MATTER OF THE LOCAL COMPETITION PROVISIONS OF
THE TELECOMMUNICATIONS ACT OF 1996, in CC Docket No. 96-98 (FCC 99-370) (rel.
November 24, 1999), portions of which become effective thirty (30) days
following publication of such Order in the Federal Register (February 17, 2000)
and other portions of which become effective 120 days following publication of
such Order in the Federal Register (May 17, 2000). By executing this amendment
SWBT does not waive any of its rights, remedies or arguments with respect to
such decisions and any remands thereof, including its right to seek legal review
or a stay of such decisions, or its rights under Sections 3.1 of the
Interconnection Agreement between Birch Telecom of Kansas, Inc. and SWBT.

                                       3
<Page>

                                    EXHIBIT A

<Page>

NN = Not Negotiated                                             Appendix Pricing
                                                              Schedule of Prices
                                                        Effective Date: 10/18/00

       SOUTHWESTERN BELL TELEPHONE COMPANY/BIRCH TELECOM OF KANSAS, INC.
                                     KANSAS



----------------------------------------------------------------------------------------------------------------------------------
LINE  CHANGE/      RATE ELEMENT              SERVICE            USOCS     RECURRING  NONRECURRING   NONRECURRING   SUBSEQUENT
      UPDATES                                                              RATE       RATE FIRST    RATE           CHANGES
                                                                                                    ADDITIONAL
----------------------------------------------------------------------------------------------------------------------------------
                                                                                            
  1            UNBUNDLED NETWORK
               ELEMENTS
  2            Local Loops         Disconnect Loop from          NRBND        None     $    20.49    $   10.25
                                   inside wiring, perNID
  3  01/03/01                      2-Wire Analog Zone 1         U21/RB9   $    23.54   $    28.45    $   13.55      KS  Dkt 149-GIT
                                   (Rural)                                                                          and 032-GIT
  4  01/03/01                      2-Wire Analog Zone 2         U21/RB9   $    13.77   $    28.45    $   13.55      KS  Dkt 149-GIT
                                   (Suburban)                                                                       and 032-GIT
  5  01/03/01                      2-Wire Analog Zone 3         U21/RB9   $    12.71   $    28.45    $   13.55      KS  Dkt 149-GIT
                                   (Urban)                                                                          and 032-GIT
  6                                2-Wire Analog                 NRBM4         NN            NN          NN
                                   LoopNon-Recurring (Merger)
  7                                Conditioning for dB loss       UL2     $     7.81   $    22.76    $    8.58
                                   from 8db to 5db
  8  01/03/01                      4-Wire Analog Zone             U4H     $    42.16   $    47.60    $   23.00      KS  Dkt 149-GIT
                                   1(Rural)                                                                         and 032-GIT
  9  01/03/01                      4-Wire Analog Zone 2           U4H     $    24.21   $    47.60    $   23.00      KS  Dkt 149-GIT
                                   (Suburban)                                                                       and 032-GIT
 10  01/03/01                      4-Wire Analog Zone 3           U4H     $    19.65   $    47.60    $   23.00      KS  Dkt 149-GIT
                                   (Urban)                                                                          and 032-GIT
 11  01/03/01                      2-Wire Digital Zone          U2Q/RB8   $    37.46   $    15.03    $    6.22      KS  Dkt 149-GIT
                                   1(Rural)                                                                     I   032-GIT
 12  01/03/01                      2-Wire Digital Zone 2        U2Q/RB8   $    26.28   $    15.03    $    6.22      KS  Dkt 149-GIT
                                   (Suburban)                                                                   I   and 032-GIT
 13  01/03/01                      2-Wire Digital Zone 3        U2Q/RB8   $    39.95   $    15.03    $    6.22      KS  Dkt 149-GIT
                                   (Urban)                                                                      I   and 032-GIT
 14  01/03/01                      4-Wire Digital Zone         U4D1X/RB6  $    85.96   $    68.40    $   27.25      KS  Dkt 149-GIT
                                   1(Rural)                                                                         and 032-GIT
 15  01/03/01                      4-Wire Digital Zone 2       U4D1X/RB6  $    76.21   $    68.40    $   27.25      KS  Dkt 149-GIT
                                   (Suburban)                                                                       and 032-GIT
 16  01/03/01                      4-Wire Digital Zone 3       U4D1X/RB6  $    76.89   $    68.40    $   27.25      KS  Dkt 149-GIT
                                   (Urban)                                                                          and 032-GIT
 17                                DS3 Loop Zone 1 (Rural)       U4D3X         NN           NN           NN
 18                                DS3 Loop Zone 2 (Suburban)    U4D3X         NN           NN           NN
 19                                DS3 Loop Zone 3 (Urban)       U4D3X         NN           NN           NN
 20            DSL Capable Loops
 21  01/03/01  2-Wire Digital      *PSD #1 - 2-Wire Digital       U2Q     $    37.46   $    15.03  I $    6.22      KS  Dkt 149-GIT
               Loop ISDN/IDSL      Loop ISDN/IDSL - Zone 1                                                      I   and 032-GIT
                                   (Rural)
 22  01/03/01                      *PSD #1 - 2-Wire Digital       U2Q     $    26.28   $    15.03  I $    6.22      KS  Dkt 149-GIT
                                   Loop ISDN/IDSL - Zone 2                                                      I   and 032-GIT
                                   (Suburban)
 23  01/03/01                      *PSD #1 2-Wire Digital         U2Q     $    39.95   $    15.03  I $    6.22      KS  Dkt 149-GIT
                                   Loop ISDN/IDSL - Zone 3                                                      I   and 032-GIT
                                   (Urban)
 24  01/03/01  2-Wire xDSL Loop    *PSD #1 - 2-Wire xDSL         2SLAX    $    23.34   $    28.45    $   13.55      KS  Dkt 149-GIT
                                   Loop - Zone 1 (Rural)                                                            and 032-GIT
 25  01/03/01                      *PSD #1 - 2-Wire xDSL         2SLAX    $    13.64   $    28.45    $   13.55      KS  Dkt 149-GIT
                                   Loop - Zone 2 (Suburban)                                                         and 032-GIT
 26  01/03/01                      *PSD #1 - 2-Wire xDSL         2SLAX    $    11.86   $    28.45    $   13.55      KS  Dkt 149-GIT
                                   Loop - Zone 3 (Urban)                                                            and 032-GIT
 27  01/03/01                      *PSD #2 - 2-Wire xDSL         2SLCX    $    23.34   $    28.45    $   13.55      KS  Dkt 149-GIT
                                   Loop - Zone 1 (Rural)                                                            and 032-GIT
 28  01/03/01                      *PSD #2 - 2-Wire xDSL         2SLCX    $    13.64   $    28.45    $   13.55      KS  Dkt 149-GIT
                                   Loop - Zone 2 (Suburban)                                                         and 032-GIT
 29  01/03/01                      *PSD #2 - 2-Wire xDSL         2SLCX    $    11.86   $    28.45    $   13.55      KS  Dkt 149-GIT
                                   Loop - Zone 3 (Urban)                                                            and 032-GIT
 30  01/03/01                      *PSD #3 - 2-Wire xDSL         2SLBX    $    23.34   $    28.45    $   13.55      KS  Dkt 149-GIT
                                   Loop - Zone 1 (Rural)                                                            and 032-GIT
 31  01/03/01                      *PSD #3 - 2-Wire xDSL         2SLBX    $    13.64   $    28.45    $   13.55      KS  Dkt 149-GIT
                                   Loop - Zone 2 (Suburban)                                                         and 032-GIT
 32  01/03/01                      *PSD #3 - 2-Wire xDSL         2SLBX    $    11.86   $    28.45    $   13.55      KS  Dkt 149-GIT
                                   Loop - Zone 3 (Urban)                                                            and 032-GIT
 33  01/03/01                      *PSD #4 - 2-Wire xDSL         2SLDX    $    23.34   $    28.45    $   13.55      KS  Dkt 149-GIT
                                   Loop - Zone 1 (Rural)                                                            and 032-GIT
 34  01/03/01                      *PSD #4 - 2-Wire xDSL         2SLDX    $    13.64   $    28.45    $   13.55      KS  Dkt 149-GIT
                                   Loop - Zone 2 (Suburban)                                                         and 032-GIT
 35  01/03/01                      *PSD #4 - 2-Wire xDSL         2SLDX    $    11.86   $    28.45    $   13.55      KS  Dkt 149-GIT
                                   Loop - Zone 3 (Urban)                                                            and 032-GIT
 36  01/03/01                      *PSD #5 - 2-Wire xDSL          U2F     $    23.34   $    28.45    $   13.55      KS  Dkt 149-GIT
                                   Loop - Zone 1 (Rural)                                                            and 032-GIT
 37  01/03/01                      *PSD #5 - 2-Wire xDSL          U2F     $    13.64   $    28.45    $   13.55      KS  Dkt 149-GIT
                                   Loop - Zone 2 (Suburban)                                                         and 032-GIT
 38  01/03/01                      *PSD #5 - 2-Wire xDSL          U2F     $    11.86   $    28.45    $   13.55      KS  Dkt 149-GIT
                                  Loop - Zone 3 (Urban)                                                            and 032-GIT
 39  01/03/01                      *PSD #7 - 2-Wire xDSL       2SLFX      $    23.34   $    28.45    $   13.55      KS  Dkt 149-GIT
                                   Loop - Zone 1 (Rural)                                                            and 032-GIT


----------------------------------------------------------------------------------------------------------------------------------



                                                                         1 OF 21
                                                           Last Updated 03/15/01
<Page>

NN = Not Negotiated                                             Appendix Pricing
                                                              Schedule of Prices
                                                         Effective Date 10/18/00

       SOUTHWESTERN BELL TELEPHONE COMPANY/BIRCH TELECOM OF KANSAS, INC.
                                     KANSAS


----------------------------------------------------------------------------------------------------------------------------------
LINE  CHANGE/      RATE ELEMENT              SERVICE            USOCS     RECURRING  NONRECURRING   NONRECURRING   SUBSEQUENT
      UPDATES                                                                RATE     RATE FIRST        RATE        CHANGES
                                                                                                     ADDITIONAL
----------------------------------------------------------------------------------------------------------------------------------
                                                                                            
 40  01/03/01                      *PSD #7 - 2-Wire xDSL       2SLFX      $    13.64   $    28.45    $   13.55      KS  Dkt 149-GIT
                                   Loop - Zone 2 (Suburban)                                                         and 032-GIT
 41  01/03/01                      *PSD #7 - 2-Wire xDSL       2SLFX      $    11.86   $    28.45    $   13.55      KS  Dkt 149-GIT
                                   Loop - Zone 3 (Urban)                                                            and 032-GIT
 42  01/03/01  4-Wire xDSL Loop    *PSD #3 - 4-Wire xDSL       4SL1X      $    41.76   $    47.60    $   23.00      KS  Dkt 149-GIT
                                   Loop - Zone 1 (Rural)                                                            and 032-GIT
 43  01/03/01                      *PSD #3 - 4-Wire xDSL       4SL1X      $    23.94   $    47.60    $   23.00      KS  Dkt 149-GIT
                                   Loop - Zone 2 (Suburban)                                                         and 032-GIT
 44  01/03/01                      *PSD #3 - 4-Wire xDSL       4SL1X      $    19.44   $    47.60    $   23.00      KS  Dkt 149-GIT
                                   Loop - Zone 3 (Urban)                                                            and 032-GIT
 45  01/03/01  HFPL Loop           HFPL Loop - Zone 1 (Rural)  ULPPX      $     0.00       NA            NA         KS  Dkt   149-GI
                                                                                                                    and 032-GIT
 46  01/03/01                      HFPL Loop - Zone 2          ULPPX      $     0.00       NA            NA         KS  Dkt   149-GI
                                   (Suburban)                                                                       and 032-GIT
 47  01/03/01                      HFPL Loop - Zone 3 (Urban)  ULPPX      $     0.00       NA            NA         KS  Dkt   149-GI
                                                                                                                    and 032-GIT
 48  01/03/01  Loop                Loop Qualification          NR98U           NA      $     0.00    $    0.00  I   KS  Dkt   149-GI
               Qualification       Process - Mechanized                                                             and 032-GIT
               Process
 49  01/03/01                      Loop Qualification          NRBXU           NA      $     0.00  I $    0.00      I KS  Dkt 149-GI
                                   Process - Manual                                                                 and 032-GIT
 50                                Loop Qualification          NR98Y           NA         TBD            NA
                                   Process - Detailed Manual
 51  01/03/01  HFPL Splitter       SBC owned splitter--line    MYQXB      $     0.89       NA            NA         KS  Dkt   149-GI
                                   at a time                                                                        and 032-GIT
 52  01/03/01  DSL Conditioning    Removal of Repeaters        NRBXV          None     $   100.00  I $   100.0  I   KS  Dkt   149-GI
               Options                                                                                              and 032-GIT
 53  01/03/01                      Incremental Removal of      NRBNL          None     $   100.00  I $   100.0  I   KS  Dkt   149-GI
                                   Repeater (> than 17.5                                                            and 032-GIT
                                   Kft.same location/same
                                   cable)
 54  01/03/01                      Incremental Additional      NRBNP          None     $   100.00  I $   100.0  I   KS  Dkt   149-GI
                                   Removal of Repeater (>                                                           and 032-GIT
                                   than 17.5 Kft.same
                                   location/different cable)
 55  01/03/01                      Removal of Bridged Taps     NRBXH          None     $   100.00  I $   100.0  I   KS  Dkt 149-GIT
                                   and Repeaters                                                                    032-GIT
 56  01/03/01                      Incremental Removal of      NRBTV          None     $   100.00  I $   100.0  I   KS  Dkt 149-GIT
                                   Bridged Taps and                                                                 032-GIT
                                   Repeaters (>than 17.5K
                                   same location/same cable)
 57  01/03/01                      Incremental Additional      NRBTW          None     $   100.00  I $   100.0  I   KS  Dkt 149-GIT
                                   Removal of Bridged Taps                                                          032-GIT
                                   and Repeaters (>than
                                   17.5K same
                                   location/different cable)
 58  01/03/01                      Removal of Bridged Taps     NRBXW          None     $   100.00  I $   100.0  I   KS  Dkt 149-GIT
                                                                                                                    032-GIT
 59  01/03/01                      Incremental Removal of      NRBNK          None     $   100.00  I $   100.0  I   KS  Dkt 149-GIT
                                   Bridged Tap (> than 17.5                                                         032-GIT
                                   Kft.same location/same
                                   cable)
 60  01/03/01                      Incremental Additional      NRBNN          None     $   100.00  I $   100.0  I   KS  Dkt 149-GIT
                                   Removal of Bridged Tap (>                                                        032-GIT
                                   than 17.5 Kft.same
                                   location/different cable)
 61  01/03/01                      Removal of Bridged Taps     NRBXF          None     $   100.00  I $   100.0  I   KS  Dkt 149-GIT
                                   and Load Coils                                                                   032-GIT
 62  01/03/01                      Incremental Removal of      NRBM8          None     $   100.00  I $   100.0  I   KS  Dkt 149-GIT
                                   Load Coil & Bridge Tap (>                                                        032-GIT
                                   than 17.5 Kft.same
                                   location/same Cable)
 63  01/03/01                      Incremental Additional      NRBM9          None     $   100.00  I $   100.0  I   KS  Dkt 149-GIT
                                   Removal of Load Coil &                                                           032-GIT
                                   Bridge Tap (> than 17.5
                                   Kft.same
                                   location/different Cable)
 64  01/03/01                      Removal of Load Coils       NRBXZ          None     $   100.00  I $   100.0  I   KS  Dkt 149-GIT
                                                                                                                    032-GIT
 65  01/03/01                      Incremental Removal of      NRBNJ          None     $   100.00  I $   100.0  I   KS  Dkt 149-GIT
                                   Load Coil (> than 17.5                                                           032-GIT
                                   Kft.same location/same
                                   Cable)
 66  01/03/01                      Incremental Additional      NRBNH          None     $   100.00  I $   100.0  I   KS  Dkt 149-GIT
                                   Removal of Load Coil (>                                                          032-GIT
                                   than 17.5 Kft.same
                                   location/different Cable)
 67  01/03/01  DSL Cross Connects  DSL Shielded Loop to        UXRRX      $     0.68   $    17.29  I $   17.29      KS  Dkt 149-GIT
                                   Collocation                                                                  I   032-GIT
 68  01/03/01                      2-Wire DSLNon-Shielded      UCX92      $     1.47   $    17.29  I $   17.29      KS  Dkt 149-GIT
                                   Cross Connect to                                                             I   032-GIT
                                   Collocation
 69  01/03/01                      4-Wire DSLNon-Shielded      UCX94      $     2.95   $    41.63  I $   35.73      KS  Dkt 149-GIT
                                   Cross Connect to                                                             I   032-GIT
                                   Collocation
 70  01/03/01                      HFPL Cross Connect - CLEC   UKCGE      $     0.73   $    65.15  I $   46.82      KS  Dkt 149-GIT
                                   OwnedNon-Integrated                                                          I   032-GIT
-----------------------------------------------------------------------------------------------------------------------------------


                                                                       2 OF 21


<Page>

NN = Not Negotiated                                             Appendix Pricing
                                                              Schedule of Prices
                                                         Effective Date 10/18/00


       SOUTHWESTERN BELL TELEPHONE COMPANY/BIRCH TELECOM OF KANSAS, INC.
                                     KANSAS

-----------------------------------------------------------------------------------------------------------------------------------
LINE  CHANGE/      RATE ELEMENT              SERVICE            USOCS     RECURRING  NONRECURRING   NONRECURRING   SUBSEQUENT
      UPDATES                                                              RATE       RATE FIRST    RATE           CHANGES
                                                                                                    ADDITIONAL
-----------------------------------------------------------------------------------------------------------------------------------
                                                                                            

     01/03/01                      HFPL Cross Connect - CLEC     UKCGD    $     0.73   $    65.15  I $   46.82      KS  Dkt 149-GIT
                                   Owned Integrated                                                             I   032-GIT
     01/03/01                      HFPL Cross Connects - SBC     UKCGX    $     0.73   $    77.17  I $   55.00      KS  Dkt 149-GIT
                                   Owned                                                                        I   032-GIT
 71  01/03/01  HFPL OSS Charge     HFPL OSS Charge - Per Line     UM3     $     0.00        NA             NA       KS  Dkt 149-GIT
                                                                                                                    032-GIT
 72  01/03/01  Loop Cross          2-Wire Analog Loop to         UCXC2    $     1.47   $    17.29  I $   17.29      KS  Dkt 149-GIT
               Connects            Collocation                                                                  I   032-GIT
 73  01/03/01                      2-Wire Analog Loop to         UCXD2    $     1.27   $    17.29  I $   17.29      KS  Dkt 149-GIT
                                   Collocation (without                                                         I   032-GIT
                                   testing)
 74  01/03/01                      4-Wire Analog Loop to         UCXC4    $     2.95   $    41.63  I $   35.73      KS  Dkt 149-GIT
                                   Collocation                                                                  I   032-GIT
 75  01/03/01                      4-Wire Analog Loop to         UCXD4    $     2.46   $    41.63  I $   35.73      KS  Dkt 149-GIT
                                   Collocation (without                                                         I   032-GIT
                                   testing)
 76  01/03/01                      2-Wire Digital Loop to     (UCXC2)under     NN      $    17.29  I $   17.29      KS  Dkt 149-GIT
                                   Collocation                 development                                      I   032-GIT
 77  01/03/01                      2-Wire Digital Loop to     (UCXD2)under     NN      $    17.29  I $   17.29      KS  Dkt 149-GIT
                                   Collocation (without        development                                      I   032-GIT
                                   testing)
 78  01/03/01                      4-Wire Digital Loop to     (UCXHX)under     NN      $    46.65    $   32.15      KS  Dkt 149-GIT
                                   Collocation                development                                           032-GIT
 79                                4-Wire Digital Loop to        UDLD4    $     0.00   $     0.00    $    0.00
                                   Collocation (without
                                   testing)
 80                                2-wire Analog Loop to      UDLW2)under $     0.00   $    35.83    $   29.44
                                   DCS/NRS                    development
 81                                4-wire Analog Loop to        UCXGX     $     0.00   $    41.63    $   35.73
                                   DCS/NRS
 82                                2-wire Digital Loop to       UDU5X          NN      $    35.83    $   29.44
                                   DCS/NRS
 83                                4-wire Digital Loop to    UCXHX)under       NN      $    60.04    $   41.06
                                   DCS/NRS                    development
 84                                DS3 Loop to DCS              UDU3X          NN          NN             NN
 85                                2-Wire Analog Loop to Mux   under devel$     3.26   $    52.35    $   45.85
 86                                4-Wire Analog Loop to Mux   under devel$     4.54   $    60.47    $   54.57
 87                                2-Wire Digital Loop to Mux  under devel$     7.47       NN             NN
 88                                4-Wire Digital Loop to Mux  under devel     NN          NN             NN
 89                                2-Wire Analog Loop to       UCXM2      $     3.26   $    52.35    $   45.85
                                   Collo/Mux  (dff't CO)
 90                                2-Wire Analog Loop to      (UCXM2)under$     3.01       NN             NN
                                   Collo/Mux without testing   development
                                   (dff't CO)
 91                                4-Wire Analog Loop to         UCXM4    $     4.54   $    60.47    $   54.57
                                   Collo/Mux (dff't CO)
 92                                4-Wire Analog Loop to     (UCXM4)under $     4.06       NN             NN
                                   Collo/Mux without testing   development
                                   (dff't CO)
 93                                2-wire  Digital Loop to       UCXS2    $     7.47   $    52.24    $   45.85
                                   Collo/Mux (dff't CO)
 94                                2-wire  Digital Loop to   (UCXS2)under $     7.23       NN             NN
                                   Collo/Mux without testing   development
                                   (dff't CO)
 95                                4-Wire  Digital Loop to       UDLY4         NN      $    53.06    $   38.50
                                   Collo/Mux (dff't CO)
 96                                4-wire  Digital Loop to   (UDLY4)under      NN          NN             NN
                                   Collo/Mux without testing   development
                                   (dff't CO)
 97                                2-wire Analog Loop to         UDLX2         NN      $    35.83    $   29.44
                                   Analog Line Port
 98                                2-wire Analog Loop to          under        NN          NN             NN
                                   Analog DID Trunk Port       development
 99                                2-wire Digital Loop to    (UDLW2)under      NN      $    35.83    $   29.44
                                   ISDN BRI Line Port          development
100                                4-wire Digital Loop to    (UCXGX)under      NN      $    60.04    $   41.06
                                   ISDN PRI Trunk Port         development
101                                4-wire Digital Loop to         under        NN          NN             NN
                                   DS1 Trunk Port              development
102                                DS3 C.O. Cross Connect to      UCXBX        NN          NN             NN
                                   Collocation
-----------------------------------------------------------------------------------------------------------------------------------


                                                                         3 OF 21

<Page>

NN = Not Negotiated                                             Appendix Pricing
                                                              Schedule of Prices
                                                         Effective Date 10/18/00

       SOUTHWESTERN BELL TELEPHONE COMPANY/BIRCH TELECOM OF KANSAS, INC.
                                     KANSAS


-----------------------------------------------------------------------------------------------------------------------------------
LINE  CHANGE/      RATE ELEMENT              SERVICE            USOCS     RECURRING  NONRECURRING   NONRECURRING   SUBSEQUENT
      UPDATES                                                              RATE       RATE FIRST       RATE         CHANGES
                                                                                                     ADDITIONAL
-----------------------------------------------------------------------------------------------------------------------------------
                                                                                            

103                                Channelized DS1 Basic       Not            NN       $    11.64    $   11.64
                                   Cross Connect, Capacity     available
                                   for Virtual Remote
                                   Terminal - Install
104                                Channelized DS1 Basic       Not            NN       $     7.08    $    7.08
                                   Cross Connect, Capacity     available
                                   for Virtual Remote
                                   Terminal - Disc.
105            Cross Connects to   2-wire Analog Loop to POA   UXRA1      $     0.24       NN             NN
               Point of Access     - Method 1
               (POA)
106                                2-wire Analog Loop to POA   UXRA2      $     0.24       NN             NN
                                   - Method 2
107                                2-wire Analog Loop to POA   UXRA3      $     0.24       NN             NN
                                   - Method 3
108                                2-wire Analog Loop to POA   UXRA4      $     0.24       NN             NN
                                   - Method 4
109                                2-wire Analog Loop to POA   UXRA5      $     0.24       NN             NN
                                   - Method 5
110                                4-wire Analog Loop to POA   UXRB1      $     0.48       NN             NN
                                   - Method 1
111                                4-wire Analog Loop to POA   UXRB2      $     0.48       NN             NN
                                   - Method 2
112                                4-wire Analog Loop to POA   UXRB3      $     0.48       NN             NN
                                   - Method 3
113                                4-wire Analog Loop to POA   UXRB4      $     0.48       NN             NN
                                   - Method 4
114                                4-wire Analog Loop to POA   UXRB5      $     0.48       NN             NN
                                   - Method 5
115                                2-wire Digital Loop to      UXRC1      $     0.24       NN             NN
                                   POA - Method 1
116                                2-wire Digital Loop to      UXRC2      $     0.24       NN             NN
                                   POA - Method 2
117                                2-wire Digital Loop to      UXRC3      $     0.24       NN             NN
                                   POA - Method 3
118                                2-wire Digital Loop to      UXRC4      $     0.24       NN             NN
                                   POA - Method 4
119                                2-wire Digital Loop to      UXRC5      $     0.24       NN             NN
                                   POA - Method 5
120                                4-wire Digital Loop to      UXRD1      $     0.48       NN             NN
                                   POA - Method 1
121                                4-wire Digital Loop to      UXRD2      $     0.48       NN             NN
                                   POA - Method 2
122                                4-wire Digital Loop to      UXRD3      $     0.48       NN             NN
                                   POA - Method 3
123                                4-wire Digital Loop to      UXRD4      $     0.48       NN             NN
                                   POA - Method 4
124                                4-wire Digital Loop to      UXRD5      $     0.48       NN             NN
                                   POA - Method 5
125                                Analog Line Port to POA -   UXRE1      $     0.24       NN             NN
                                   Method 1
126                                Analog Line Port to POA -   UXRE2      $     0.24       NN             NN
                                   Method 2
127                                Analog Line Port to POA -   UXRE3      $     0.24       NN             NN
                                   Method 3
128                                Analog Line Port to POA -   UXRE4      $     0.24       NN             NN
                                   Method 4
129                                Analog Line Port to POA -   UXRE5      $     0.24       NN             NN
                                   Method 5
130                                ISDN BRI Line Port to POA   UXRL1      $     0.48       NN             NN
                                   - Method 1
131                                ISDN BRI Line Port to POA   UXRL2      $     0.48       NN             NN
                                   - Method 2
132                                ISDN BRI Line Port to POA   UXRL3      $     0.48       NN             NN
                                   - Method 3
133                                ISDN BRI Line Port to POA   UXRL4      $     0.48       NN             NN
                                   - Method 4
134                                ISDN BRI Line Port to POA   UXRL5      $     0.48       NN             NN
                                   - Method 5
135                                ISDN PRI Trunk Port to      UXRM1      $     0.48       NN             NN
                                   POA - Method 1
136                                ISDN PRI Trunk Port to      UXRM2      $     0.48       NN             NN
                                   POA - Method 2
137                                ISDN PRI Trunk Port to      UXRM3      $     0.48       NN             NN
                                   POA - Method 3
138                                ISDN PRI Trunk Port to      UXRM4      $     0.48       NN             NN
                                   POA - Method 4
139                                ISDN PRI Trunk Port to      UXRM5      $     0.48       NN             NN
                                   POA - Method 5
140                                Analog DID Trunk Port to    UXRH1           NN          NN             NN
                                   POA - Method 1
141                                Analog DID Trunk Port to    UXRH2           NN          NN             NN
                                   POA - Method 2
142                                Analog DID Trunk Port to    UXRH3           NN          NN             NN
                                   POA - Method 3
-----------------------------------------------------------------------------------------------------------------------------------


                                                                         4 OF 21

<Page>

NN = Not Negotiated                                             Appendix Pricing
                                                              Schedule of Prices
                                                         Effective Date 10/18/00

       SOUTHWESTERN BELL TELEPHONE COMPANY/BIRCH TELECOM OF KANSAS, INC.
                                     KANSAS


-----------------------------------------------------------------------------------------------------------------------------------
LINE  CHANGE/      RATE ELEMENT              SERVICE            USOCS     RECURRING  NONRECURRING   NONRECURRING   SUBSEQUENT
      UPDATES                                                              RATE       RATE FIRST    RATE           CHANGES
                                                                                                    ADDITIONAL
-----------------------------------------------------------------------------------------------------------------------------------
                                                                                            

143                                Analog DID Trunk Port to       UXRH4        NN          NN             NN
                                   POA - Method 4
144                                Analog DID Trunk Port to       UXRH5        NN          NN             NN
                                   POA - Method 5
145                                DS1 Trunk Port to POA -        UXRK1        NN          NN             NN
                                   Method 1
146                                DS1 Trunk Port to POA -        UXRK2        NN          NN             NN
                                   Method 2
147                                DS1 Trunk Port to POA -        UXRK3        NN          NN             NN
                                   Method 3
148                                DS1 Trunk Port to POA -        UXRK4        NN          NN             NN
                                   Method 4
149                                DS1 Trunk Port to POA -        UXRK5        NN          NN             NN
                                   Method 5
150                                DS1Network Trunk to POA -      UXRN1        NN          NN             NN
                                   Method 1
151                                DS1Network Trunk to POA -      UXRN2        NN          NN             NN
                                   Method 2
152                                DS1Network Trunk to POA -      UXRN3        NN          NN             NN
                                   Method 3
153                                DS1Network Trunk to POA -      UXRN4        NN          NN             NN
                                   Method 4
154                                DS1Network Trunk to POA -      UXRN5        NN          NN             NN
                                   Method 5
155                                Unbundled Dedicated             Not    $     3.26       NN             NN
                                   Transport to POA:  Voice    applicable
                                   Grade, 2-Wire
156                                Unbundled Dedicated             Not    $     4.54       NN             NN
                                   Transport to POA:  Voice    applicable
                                   Grade, 4-Wire
157                                Unbundled Dedicated            UXRQ1   $     6.63       NN             NN
                                   Transport to POA:  DS1 -
                                   Method 1
158                                Unbundled Dedicated            UXRQ2   $     6.63       NN             NN
                                   Transport to POA:  DS1 -
                                   Method 2
159                                Unbundled Dedicated            UXRQ3   $     6.63       NN             NN
                                   Transport to POA:  DS1 -
                                   Method 3
160                                Unbundled Dedicated            UXRQ4   $     6.63       NN             NN
                                   Transport to POA:  DS1 -
                                   Method 4
161                                Unbundled Dedicated            UXRQ5   $     6.63       NN             NN
                                   Transport to POA:  DS1 -
                                   Method 5
162                                Unbundled Dedicated            under        NN          NN             NN
                                   Transport to POA:  DS3 -    development
                                   Method 1
163                                Unbundled Dedicated            under        NN          NN             NN
                                   Transport to POA:  DS3 -    development
                                   Method 2
164                                Unbundled Dedicated            under        NN          NN             NN
                                   Transport to POA:  DS3 -    development
                                   Method 3
165                                Unbundled Dedicated            under        NN          NN             NN
                                   Transport to POA:  DS3 -    development
                                   Method 4
166                                Unbundled Dedicated            under        NN          NN             NN
                                   Transport to POA:  DS3 -    development
                                   Method 5
167                                Unbundled Dedicated            under        NN          NN             NN
                                   Transport to POA:  OC3 -    development
                                   Method 1
168                                Unbundled Dedicated            under        NN          NN             NN
                                   Transport to POA:  OC3 -    development
                                   Method 2
169                                Unbundled Dedicated            under        NN          NN             NN
                                   Transport to POA:  OC3 -    development
                                   Method 3
170                                Unbundled Dedicated            under        NN          NN             NN
                                   Transport to POA:  OC3 -    development
                                   Method 4
171                                Unbundled Dedicated            under        NN          NN             NN
                                   Transport to POA:  OC3 -    development
                                   Method 5
172                                Unbundled Dedicated            under        NN          NN             NN
                                   Transport to POA:  OC12 -   development
                                   Method 1
173                                Unbundled Dedicated            under        NN          NN             NN
                                   Transport to POA:  OC12 -   development
                                   Method 2
174                                Unbundled Dedicated            under        NN          NN             NN
                                   Transport to POA:  OC12 -   development
                                   Method 3
175                                Unbundled Dedicated            under        NN          NN             NN
                                   Transport to POA:  OC12 -   development
                                   Method 4
176                                Unbundled Dedicated            under        NN          NN             NN
                                   Transport to POA:  OC12 -   development
                                   Method 5
177                                Unbundled Dedicated            under        NN          NN             NN
                                   Transport to POA:  OC48 -   development
                                   Method 1
178                                Unbundled Dedicated            under        NN          NN             NN
                                   Transport to POA:  OC48 -   development
                                   Method 2
179                                Unbundled Dedicated            under        NN          NN             NN
                                   Transport to POA:  OC48 -   development
                                   Method 3
180                                Unbundled Dedicated            under        NN          NN             NN
                                   Transport to POA:  OC48 -   development
                                   Method 4
181                                Unbundled Dedicated            under        NN          NN             NN
                                   Transport to POA:  OC48 -   development
                                   Method 5
182                                Connecting IDF to CLEC          Not    $     0.33       NN             NN
                                   Cage, Method 1              available
183                                Connecting IDF to Common        Not    $     0.36       NN             NN
                                   Area Method 2               available
184                                Connecting IDF to               Not    $     0.41       NN             NN
                                   Separate Room or Cage,      available
                                   Method 3
-----------------------------------------------------------------------------------------------------------------------------------


                                                                         5 OF 21

<Page>

NN = Not Negotiated                                             Appendix Pricing
                                                              Schedule of Prices
                                                         Effective Date 10/18/00

       SOUTHWESTERN BELL TELEPHONE COMPANY/BIRCH TELECOM OF KANSAS, INC.
                                     KANSAS


-----------------------------------------------------------------------------------------------------------------------------------
LINE  CHANGE/      RATE ELEMENT              SERVICE            USOCS     RECURRING  NONRECURRING   NONRECURRING   SUBSEQUENT
      UPDATES                                                              RATE       RATE FIRST    RATE           CHANGES
                                                                                                    ADDITIONAL
----------------------------------------------------------------------------------------------------------------------------------
                                                                                     

185                                Connecting IDF to OSP     Not          $     0.53       NN             NN
                                   Cabinet, Method 4         available
186                                Connecting IDF to         Not          $     0.33       NN             NN
                                   Adjacent CLEC Building,   available
                                   Method 5
187            Subloop Unbundling                                                          NN             NN
188            Subloop Feeder      2-Wire Analog, Zone 1     Not          $     6.11       NN             NN
                                                             available
189                                2-Wire Analog, Zone 2     Not          $     5.21       NN             NN
                                                             available
190                                2-Wire Analog, Zone 3     Not          $     6.27       NN             NN
                                                             available
191                                2-Wire Digital (BRI),     Not          $    20.46       NN             NN
                                                             available
                                   Zone 1
192                                2-Wire Digital (BRI),     Not          $    18.11       NN             NN
                                   Zone 2                    available
193                                2-Wire Digital (BRI),     Not          $    24.53       NN             NN
                                   Zone 3                    available
194                                4-Wire Analog, Zone 1     Not          $     8.46       NN             NN
                                                             available
195                                4-Wire Analog, Zone 2     Not          $     8.16       NN             NN
                                                             available
196                                4-Wire Analog, Zone 3     Not          $     9.48       NN             NN
                                                             available
197                                4-Wire Digital (PRI),     Not          $    55.64       NN             NN
                                                             available
                                   Zone 1
198                                4-Wire Digital (PRI),     Not          $    55.12       NN             NN
                                                             available
                                   Zone 2
199                                4-Wire Digital (PRI),     Not          $    55.22       NN             NN
                                                             available
                                   Zone 3
200            Subloop             2-Wire Analog, Zone 1         UG2      $    17.23       NN             NN
               Distribution
201                                2-Wire Analog, Zone 2         UG2      $     8.43       NN             NN
202                                2-Wire Analog, Zone 3         UG2      $     5.59       NN             NN
203                                2-Wire Digital (BRI),         UK2      $    20.23       NN             NN
                                   Zone 1
204                                2-Wire Digital (BRI),         UK2      $    11.39       NN             NN
                                   Zone 2
205                                2-Wire Digital (BRI),         UK2      $     8.13       NN             NN
                                   Zone 3
206                                4-Wire Analog, Zone 1         UG4      $    33.30       NN             NN
207                                4-Wire Analog, Zone 2         UG4      $    15.78       NN             NN
208                                4-Wire Analog, Zone 3         UG4      $     9.96       NN             NN
209                                4-Wire Digital (PRI),        UKR4E     $    32.84       NN             NN
                                   Zone 1
210                                4-Wire Digital (PRI),        UKR4E     $    15.14       NN             NN
                                   Zone 2
211                                4-Wire Digital (PRI),        UKR4E     $     9.26       NN             NN
                                   Zone 3
212            Local Switching     Local Switching-Per          ZZULS     $ 0.002530      None           None
                                   Originating or
                                   Terminating MOU Zone
                                   1(Rual)
213                                Local Switching-Per          ZZULS     $ 0.002391      None           None
                                   Originating or
                                   Terminating MOU Zone
                                   2(Suburban)
214                                Local Switching-Per          ZZULS     $ 0.001119      None           None
                                   Originating or
                                   Terminating MOU Zone
                                   3(Urban)
215                                Local Switching-SS7          ZZUU7          NN          NN             NN
                                   Signaling per call
216            Customized Routing  Customized Routing            under         NN          NN             NN
                                                              development
217            Customized          Per query per customer       ZZURO     $ 0.000440      None           None
               Routing  UNE AIN    line
218  01/03/01  Switch Ports        Analog Line Port - Zone 1   UYP/RBQ    $     1.97      N/A            N/A        KS  Dkt 149-GIT
                                   (Rural)                                                                          and 032-GIT
219  01/03/01                      Analog Line Port - Zone 2   UYP/RBQ    $     1.97      N/A            N/A        KS  Dkt 149-GIT
                                   (Suburban)                                                                       and 032-GIT
220  01/03/01                      Analog Line Port - Zone 3   UYP/RBQ    $     1.97      N/A            N/A        KS  Dkt 149-GIT
                                   (Urban)                                                                          and 032-GIT
221                                ISDN BRI Line Port - Zone   U1P/RBJ    $     4.83   $     6.47    $    3.53
                                   1 (Rural)
222                                ISDN BRI Line Port - Zone   U1P/RBJ    $     4.83   $     6.47    $    3.53
                                   2 (Suburban)
223                                ISDN BRI Line Port - Zone    U1PRBJ    $     4.83   $     6.47    $    3.53
                                   3 (Urban)
-----------------------------------------------------------------------------------------------------------------------------------


                                                                         6 OF 21

<Page>

NN = Not Negotiated                                             Appendix Pricing
                                                              Schedule of Prices
                                                         Effective Date 10/18/00

       SOUTHWESTERN BELL TELEPHONE COMPANY/BIRCH TELECOM OF KANSAS, INC.
                                     KANSAS


-----------------------------------------------------------------------------------------------------------------------------------
LINE  CHANGE/      RATE ELEMENT              SERVICE            USOCS     RECURRING  NONRECURRING   NONRECURRING   SUBSEQUENT
      UPDATES                                                              RATE       RATE FIRST        RATE        CHANGES
                                                                                                     ADDITIONAL
----------------------------------------------------------------------------------------------------------------------------------
                                                                                            

224  01/03/01                      ISDN PRI Line Port - Zone   UJP/RB5    $   143.98   $   214.53    $   98.53      KS  Dkt 149-GIT
                                   1 (Rural)                                                                        and 032-GIT
225  01/03/01                      ISDN PRI Line Port - Zone   UJP/RB5    $   143.98   $   214.53    $   98.53      KS  Dkt 149-GIT
                                   2 (Suburban)                                                                     and 032-GIT
226  01/03/01                      ISDN PRI Line Port - Zone   UJP/RB5    $   143.98   $   214.53    $   98.53      KS  Dkt 149-GIT
                                   3 (Urban)                                                                        and 032-GIT
227  01/03/01                      Analog DID Trunk Port       U5P/RBT    $     9.60   $    62.00    $   25.00      KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
228                                DS1 Trunk Port              U9Z        $    94.50   $   162.00    $   25.00
229                                DSX Unit/DS1 Port           Not        $     0.87        NN            NN
                                                               available
230                                Optional Calling Area       OPXEX           NN           NN            NN
                                   (Two-way EAS) Additive
231  01/03/01  Switch Port Cross   Analog Line Port to         under           NN      $    37.30    $   29.75      KS  Dkt 149-GIT
               Connects            Collocation, 4-Wire         development                                          and 032-GIT
     01/03/01                      Analog Line Port to         under           NN      $    23.65    $   17.70      KS  Dkt 149-GIT
                                   Collocation, 2-Wire         development                                          and 032-GIT
232  01/03/01                      Analog DID Trunk Port to    under           NN      $    23.65    $   17.70      KS  Dkt 149-GIT
                                   Collocation                 development                                          and 032-GIT
233  01/03/01                      ISDN BRI Line Port to       under           NN      $    27.10    $   21.45      KS  Dkt 149-GIT
                                   Collocation                 development                                          and 032-GIT
234  01/03/01                      ISDN PRI Trunk Port to      under           NN      $    42.75    $   36.05      KS  Dkt 149-GIT
                                   Collocation                 development                                          and 032-GIT
235  01/03/01                      DS1 Trunk Port to           (UCXD2)and     rNN      $    42.75    $   36.05      KS  Dkt 149-GIT
                                   Collocation                 under development                                    and 032-GIT
236                                Analog Line Port to         UDLW2           NN      $     9.61    $    9.61
                                   DCS/NRS, 2-Wire
237                                Analog Line Port to         Not available   NN      $    11.79    $   11.79
                                   DCS/NRS, 4-Wire
238                                Digital Line Port to DCS,   Not Available   NN      $     9.61    $    9.61
                                   2-Wire
239                                Digital Line Port to DCS,   Not Available   NN      $    15.00    $   15.00
                                   4-Wire
240                                Analog DID Trunk Port to    under           NN          NN             NN
                                   DCS/NRS                     development
241                                ISDN BRI Line Port to       (UCXHX)        rNN      $     9.61    $    9.61
                                   DCS/NRS                     development
242                                ISDN PRI Trunk Port to      (UCXHX)        rNN      $    15.00    $   15.00
                                   DCS/NRS                     development
243                                DS-1 Trunk Port to DCS/NRS  (UCXHX)under   rNN          NN             NN
                                                               development
244                                Analog Line Port to MUX,    under           NN      $     9.61    $    9.61
                                   2-Wire                      development
245                                Analog Line Port to MUX,    under           NN      $    11.79    $   11.79
                                   4-Wire                      development
246                                Analog DID Trunk Port to    under           NN          NN             NN
                                   Mux                         development
247                                ISDN BRI Trunk Port to Mux  (UCXS2)        rNN      $     9.61    $    9.61
                              dev  elopment
248                                ISDN PRI Trunk Port to Mux  under           NN      $    15.00    $   15.00
                                                               development
249                                DS-1 Trunk Port to UDT Mux  under           NN          NN             NN
                                                               development
250                                Analog Port to Switch       Not available   NN      $     0.21    $    0.21
                                   Port, 2-Wire Cross Connect
251                                Digital Port to Switch      Not available   NN      $     0.21    $    0.21
                                   Port, 2-Wire BRI
252                                Digital Port to Switch      Not available   NN      $     0.35    $    0.35
                                   Port, 4-Wire PIR
253  01/03/01  Feature             Call Waiting                ESX            None     $     0.05         None      KS  Dkt 149-GIT
               Activation per                                                                                       and 032-GIT
               Analog Line Port
               Type
254  01/03/01                      Call Waiting ID             NWT            None     $     0.05         None      KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
-----------------------------------------------------------------------------------------------------------------------------------


                                                                         7 OF 21

<Page>

NN = Not Negotiated                                             Appendix Pricing
                                                              Schedule of Prices
                                                         Effective Date 10/18/00

       SOUTHWESTERN BELL TELEPHONE COMPANY/BIRCH TELECOM OF KANSAS, INC.
                                     KANSAS


-----------------------------------------------------------------------------------------------------------------------------------
LINE  CHANGE/      RATE ELEMENT              SERVICE            USOCS     RECURRING  NONRECURRING   NONRECURRING   SUBSEQUENT
      UPDATES                                                               RATE      RATE FIRST        RATE         CHANGES
                                                                                                     ADDITIONAL
-----------------------------------------------------------------------------------------------------------------------------------
                                                                                            

255  01/03/01                      Call Waiting ID Options       NWL         None      $     0.05      None         KS  Dkt 149-GIT
                                   (for end user Type 2.5                                                           and 032-GIT
                                   CPE)
256  01/03/01                      Call Forwarding Variable      ESM         None      $     0.05      None         KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
257  01/03/01                      Call Forwarding Busy Line     EVB         None      $     0.05      None         KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
258  01/03/01                      Call Forwarding Don't         EVD         None      $     0.05      None         KS  Dkt 149-GIT
                                   Answer                                                                           and 032-GIT
259  01/03/01                      Call Forwarding Busy Line     E5E         None      $     0.05      None         KS  Dkt 149-GIT
                                   Don't Answer                                                                     and 032-GIT
260  01/03/01                      Call Transfer Disconnect      FG3         None      $     0.05      None         KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
261  01/03/01                      Simutaneous Call              ESD         None      $     0.05      None         KS  Dkt 149-GIT
                                   Forwarding                                                                       and 032-GIT
262  01/03/01                      Remote Access to Call         RC3         None      $     0.05      None         KS  Dkt 149-GIT
                                   Forwarding                                                                       and 032-GIT
263  01/03/01                      Three-Way Calling             ESC         None      $     0.05      None         KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
264  01/03/01                      Speed Calling 8               ESL         None      $     0.05      None         KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
265  01/03/01                      Speed Calling 30              ESF         None      $     0.05      None         KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
266  01/03/01                      Auto Callback/Auto Redial     NSQ         None      $     0.05      None         KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
267  01/03/01                      Distinctive Ring/Priority     NSK         None      $     0.05      None         KS  Dkt 149-GIT
                                   Call                                                                             and 032-GIT
268  01/03/01                      Selective Call                NSY         None      $     0.05      None         KS  Dkt 149-GIT
                                   Rejection/Call Blocker                                                           and 032-GIT
269  01/03/01                      Auto Recall/Call Return       NSS         None      $     0.05      None         KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
270  01/03/01                      Selective Call Forwarding     NCE         None      $     0.05      None         KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
271  01/03/01                      Calling # Delivery            NSD         None      $     0.05      None         KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
272  01/03/01                      CNAM Delivery                 NMP         None      $     0.05      None         KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
273  01/03/01                      CallingNumber/Name            NBJ         None      $     0.05      None         KS  Dkt 149-GIT
                                   Delivery Blocking/Per Ln                                                         and 032-GIT
                                   Block
274  01/03/01                      CallingNumber/Name            NSG         None      $     0.05      None         KS  Dkt 149-GIT
                                   Blocking                                                                         and 032-GIT
275  01/03/01                      Anonymous Call Rejection      AYK         None      $     0.05      None         KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
276  01/03/01                      Customer Alerting             AWS         None      $     0.05      None         KS  Dkt 149-GIT
                                   Enablement                                                                       and 032-GIT
277  01/03/01                      Toll Restriction              DH2         None      $     0.05      None         KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
278  01/03/01                      International Direct         NR4BK        None      $     0.05      None         KS  Dkt 149-GIT
                                   Dialing Blocking                                                                 and 032-GIT
279  01/03/01  Analog Line Port    Personalized Ring             DRS         None      $     0.20      None         KS  Dkt 149-GIT
               Features/per                                                                                         and 032-GIT
               arrangement
280  01/03/01                      Personalized Ring - DN1      DRS1X         NN       $     0.20      None         KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
281  01/03/01                      Personalized Ring - DN2      DRS2X         NN       $     0.20      None         KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
282  01/03/01                      Hunting Arrangement          NR931        None      $     2.55      None         KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
283            Analog Line Port    Call Trace (per feature       NST         None      $     0.76      None
               Features            per port)
               Activation per
               successful
               occurance
284                                Call Trace (per              ZZUCL         NN          NN            NN
                                   successful occurrence per
                                   port)
285                                Usage sensitive Call          NV9         None      $     0.76      None
                                   Return (per feature per
                                   port)
286                                Usage sensitive Call         ZZURE         NN          NN            NN
                                   Return( per occurrence)
287                                Usage sensitive Auto          NV8         None      $     0.76      None
                                   ReDial (per feature per
                                   port)
288                                Usage sensitive Auto         ZZUAR         NN          NN            NN
                                   ReDial (per occurrence)
289                                Usage sensitive Three Way     3UY         None      $     0.76      None
                                   Calling (per feature per
                                   port)
290                                Usage sensitive Three Way    ZZU3W         NN          NN            NN
                                   Calling (per occurrence)
291  01/03/01  ISDN BRI            CSV/CSD per B channel        STHXX       None       $     6.47    $    3.53      KS  Dkt 149-GIT
               Basic/BRI                                                                                            and 032-GIT
               Centrex-like &
               PRI Trunk Side
292                                Additional Call Offering      NCO          NN          NN            NN
                                   for CSV per B Channel
-----------------------------------------------------------------------------------------------------------------------------------


                                                                         8 OF 21

<Page>

NN = Not Negotiated                                             Appendix Pricing
                                                              Schedule of Prices
                                                         Effective Date 10/18/00

       SOUTHWESTERN BELL TELEPHONE COMPANY/BIRCH TELECOM OF KANSAS, INC.
                                     KANSAS


-----------------------------------------------------------------------------------------------------------------------------------
LINE  CHANGE/      RATE ELEMENT              SERVICE            USOCS     RECURRING  NONRECURRING   NONRECURRING   SUBSEQUENT
      UPDATES                                                               RATE      RATE FIRST        RATE        CHANGES
                                                                                                     ADDITIONAL
-----------------------------------------------------------------------------------------------------------------------------------
                                                                                            
293                                Call Forwarding Don't         NQ6         NN          NN             NN
                                   Answer per B Channel
294                                Call Forwarding Variable      NVF         NN          NN             NN
                                   per B Channel
295                                Three-way Conference          NZ3         NN          NN             NN
                                   Calling per B Channel
296            ISDN BRI Port       Basic EKTS per B Channel     FPG1X       None       $     5.41      None
               Features Package
297                                CACH EKTS per B Channnel     EFV1X       None       $     7.20      None
298            ISDN BRI Basic      Call Forwarding Interface     NQ5        None       $     4.24      None
               Individual Port     Busy
               Features
299                                CallingNumber Delivery        ZCN        None       $     4.24      None
300                                Hunt Group for CSD           HTKPG       None       $     4.24      None
301                                Hunt Group for CSV            GXH        None       $     4.24      None
302                                Message Waiting Indicator     NZW        None       $     4.24      None
303                                Secondary Only                DO6        None       $     4.24      None
                                   TelephoneNumber
304            ISDN PRI Trunk      Backup D Channel             ZPBXD       None       $    35.78      None
               Side Features
305                                CallingNumber Delivery        NXN        None       $     0.00      None
306                                Dynamic Channel Allocation    CCZ        None       $     5.84      None
307            Analog Trunk Port   DID #s - Initial 100 #s       ND8        None       $    15.21      None
               DS1 Digital DID
               Trunk Port
               DIDTrunk Port
               Features
308  01/03/01                      DID #s - Addtl.100 #s         ND9        None       $    12.70      None         KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
309                                DID #s - Initial 10 #s        NDZ        None       $    14.11      None
310  01/03/01                      DID #s - Addtl. 10 #s         NDA        None       $     2.10      None         KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
311  01/03/01   Centrex-like       System Establishment per     SEPUX       None       $   325.37      None         KS  Dkt 149-GIT
               System Charges      serving office - Analog                                                          and 032-GIT
                                   Only
312  01/03/01                      System Establishment per     SEPUY       None       $   325.37      None         KS  Dkt 149-GIT
                                   serving office -                                                                 and 032-GIT
                                   Analog/ISDN BRI Mix
313  01/03/01                      System  Establishment per    SEPUU        NN        $   325.37      None         KS  Dkt 149-GIT
                                   serving office - ISDN BRI                                                        and 032-GIT
                                   Only
314  01/03/01                      System Subsequent Change     NR93X       None       $    89.86      None         KS  Dkt 149-GIT
                                   per service office -                                                             and 032-GIT
                                   Analog/ ISDN BRI mixed
                                   sys or BRI only Sys & Add
                                   ISDN to existing Analog
                                   only system
315  01/03/01                      System Subsequent            NR93W       None       $    89.86      None         KS  Dkt 149-GIT
                                   Conversion per serving                                                           and 032-GIT
                                   office - Add Analog to
                                   existing ISDN BRI only
                                   system
316  01/03/01  Analog Line Port    Auto Callback                 RGE        None       $     0.05      None         KS  Dkt 149-GIT
               & BRI Line Port     Calling/Business Group                                                           and 032-GIT
               Centrex -Like       Callback
               Features
317  01/03/01                      Call Forwarding Busy Line     GCE        None       $     0.05      None         KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
318  01/03/01                      Call Hold                     6AB        None       $     0.05      None         KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
319  01/03/01                      Call Pickup                   E3P        None       $     0.05      None         KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
320  01/03/01                      Call Transfer - All Calls    TF1PS       None       $     0.05      None         KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
321  01/03/01                      Class of Service Restr. -    ERSFC       None       $     0.05      None         KS  Dkt 149-GIT
                                   Fully                                                                            and 032-GIT
322  01/03/01                      Class of Service Restr. -     RQW        None       $     0.05      None         KS  Dkt 149-GIT
                                   Semi                                                                             and 032-GIT
323  01/03/01                      Class of Service Restr. -    ERSPA       None       $     0.05      None         KS  Dkt 149-GIT
                                   Toll                                                                             and 032-GIT
324  01/03/01                      Consult. Hold                 EBE        None       $     0.05      None         KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
325  01/03/01                      Dial Call Waiting             WDK        None       $     0.05      None         KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
-----------------------------------------------------------------------------------------------------------------------------------


                                                                         9 OF 21

<Page>

NN = Not Negotiated                                             Appendix Pricing
                                                              Schedule of Prices
                                                         Effective Date 10/18/00

       SOUTHWESTERN BELL TELEPHONE COMPANY/BIRCH TELECOM OF KANSAS, INC.
                                     KANSAS


-----------------------------------------------------------------------------------------------------------------------------------
LINE  CHANGE/      RATE ELEMENT              SERVICE            USOCS     RECURRING  NONRECURRING   NONRECURRING   SUBSEQUENT
      UPDATES                                                               RATE      RATE FIRST        RATE         CHANGES
                                                                                                     ADDITIONAL
-----------------------------------------------------------------------------------------------------------------------------------
                                                                                            


326  01/03/01                      Directed Call Pickup -Non     69D         None      $     0.05      None         KS  Dkt 149-GIT
                                   Barge in                                                                         and 032-GIT
327  01/03/01                      Directed Call Pickup -        6MD         None      $     0.05      None         KS  Dkt 149-GIT
                                   With Barge in                                                                    and 032-GIT
328  01/03/01                      Distinctive Ring and Call     DRJ         None      $     0.05      None         KS  Dkt 149-GIT
                                   Waiting Tone                                                                     and 032-GIT
329  01/03/01                      Hunting Arrgmt - Basic        HRK         None      $     0.05      None         KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
330  01/03/01                      Hunting Arrgmt - Circular     HCK         None      $     0.05      None         KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
331  01/03/01  Analog Line Port    Standard feature             NR935        None      $     1.00      None         KS  Dkt 149-GIT
               Centrex-Like        initialization per analog                                                        and 032-GIT
               Features            port
332  01/03/01                      Call Forwarding Variable/     HWJ         None      $     0.05      None         KS  Dkt 149-GIT
                                   Business Group Call                                                              and 032-GIT
                                   Forwarding Variable
333  01/03/01                      Call Forwarding Don't         69H         None      $     0.05      None         KS  Dkt 149-GIT
                                   Answer                                                                           and 032-GIT
334  01/03/01                      Call Waiting -                NGW         None      $     0.05      None         KS  Dkt 149-GIT
                                   Intragroup/ Business                                                             and 032-GIT
                                   Group Call Forwarding
                                   Variable.
335  01/03/01                      Call Waiting - Orig.          6SZ         None      $     0.05      None         KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
336  01/03/01                      Call Waiting - Term.          HUH         None      $     0.05      None         KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
337  01/03/01                      Speed Calling Personal        E18         None      $     0.05      None         KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
338  01/03/01                      Three Way Calling            ESCPS        None      $     0.05      None         KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
339  01/03/01                      Voice/Data Protection         D7N         None      $     0.05      None         KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
340  01/03/01  BRI Line Port       Standard feature             NR936        None      $     0.05      None         KS  Dkt 149-GIT
               Centrex-Like        initialization per ISDN                                                          and 032-GIT
               Features            BRI Port
341  01/03/01                      Speed Calling Personal        NXG         None      $     0.05      None         KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
342            Tandem Switching    Tandem Switching Per         ZZUTA     $ 0.000789       None        None
                                   Minute Of Use
343            Blended Transport   Blended Transport  Zone 1    ZZUBT         NN            NN         NN
                                   (Rural)
344                                Blended Transport  Zone 2    ZZUBT         NN            NN         NN
                                   (Suburban)
345                                Blended Transport  Zone 3    ZZUBT         NN            NN         NN
                                   (Urban)
346            Common Transport    Common                       ZZUCT     $ 0.000196       None        None
                                   TransportTermination Per
                                   Minute of Use Zone 1
                                   (Rural)
347                                Common                       ZZUCT     $ 0.000171       None        None
                                   TransportTermination Per
                                   Minute of Use Zone 2
                                   (Suburban)
348                                Common Transport             ZZUCT     $ 0.000157       None        None
                                   Termination Per
                                   Minute of Use Zone 3
                                   (Urban)
349                                Common Transport             ZZUCT     $ 0.000186       None        None
                                   Termination Per
                                   Minute of Use Interzone
350                                Common TransportFacility     ZZUCT     $ 0.000015       None        None
                                   Per Minute, Per Mile Zone
                                   1 (Rural)
351                                Common TransportFacility     ZZUCT     $ 0.000007       None        None
                                   Per Minute, Per Mile Zone
                                   2 (Suburbanl)
352                                Common Transport Facility    ZZUCT     $ 0.000002       None        None
                                   Per Minute, Per Mile Zone
                                   3 (Urban)
353                                Common Transport Facility    ZZUCT     $ 0.000003       None        None
                                   Per Minute, Per Mile
                                   Interzone
354  03/15/01  Unbundled           UDT-DS1 Entrance             UENHX     $    76.96   $   221.15    $   87.70      KS  Dkt 149-GIT
               Dedicated           Facilities Zone 1                                                                and 032-GIT
               Transport (UDT)     (Rural)
355  03/15/01                      UDT-DS1 Entrance             UENHX     $    76.96   $   221.15    $   87.70      KS  Dkt 149-GIT
                                   Facilities Zone 2                                                                and 032-GIT
                                   (Suburban)
356  03/15/01                      UDT-DS1 Entrance             UENHX     $    75.81   $   221.15    $   87.70      KS  Dkt 149-GIT
                                   Facilities Zone 3                                                                and 032-GIT
                                   (Urban)
357  03/15/01                      UDT-DS3 Entrance             UENJX     $   458.44   $   260.45    $   107.4      KS  Dkt 149-GIT
                                   Facilities Zone 1                                                                and 032-GIT
                                   (Rural)
358  03/15/01                      UDT-DS3 Entrance             UENJX     $   458.44   $   260.45    $   107.4      KS  Dkt 149-GIT
                                   Facilities Zone 2                                                                and 032-GIT
                                   (Suburban)
359  03/15/01                      UDT-DS3 Entrance             UENJX     $   362.87   $   260.45    $   107.4      KS  Dkt 149-GIT
                                   Facilities Zone 3                                                                and 032-GIT
                                   (Urban)
-----------------------------------------------------------------------------------------------------------------------------------


                                                                        10 OF 21

<Page>

NN = Not Negotiated                                             Appendix Pricing
                                                              Schedule of Prices
                                                         Effective Date 10/18/00

       SOUTHWESTERN BELL TELEPHONE COMPANY/BIRCH TELECOM OF KANSAS, INC.
                                     KANSAS


----------------------------------------------------------------------------------------------------------------------------------
LINE  CHANGE/      RATE ELEMENT         SERVICE            USOCS     RECURRING  NONRECURRING   NONRECURRING         SUBSEQUENT
      UPDATES                                                                RATE     RATE FIRST        RATE         CHANGES
                                                                                                     ADDITIONAL
----------------------------------------------------------------------------------------------------------------------------------
                                                                                            

360  03/15/01                      UDT-OC3 Entrance         UENKX         $   719.97   $   273.05    $   105.6      KS  Dkt 149-GIT
                                   Facilities Zone 1                                                                and 032-GIT
                                   (Rural)
361  03/15/01                      UDT-OC3 Entrance         UENKX         $   719.97   $   273.05    $   105.6      KS  Dkt 149-GIT
                                   Facilities Zone 2                                                                and 032-GIT
                                   (Suburban)
362  03/15/01                      UDT-OC3 Entrance         UENKX         $   681.16   $   273.05    $   105.6      KS  Dkt 149-GIT
                                   Facilities Zone 3                                                                and 032-GIT
                                   (Urban)
363  03/15/01                      UDT-OC12 Entrance        UENLX         $ 1,628.22   $   273.05    $   105.6      KS  Dkt 149-GIT
                                   Facilities Zone 1                                                                and 032-GIT
                                   (Rural)
364  03/15/01                      UDT-OC12 Entrance        UENLX         $ 1,628.22   $   273.05    $   105.6      KS  Dkt 149-GIT
                                   Facilities Zone 2                                                                and 032-GIT
                                   (Suburban)
365  03/15/01                      UDT-OC12 Entrance        UENLX         $ 1,589.41   $   273.05    $   105.6      KS  Dkt 149-GIT
                                   Facilities Zone 3                                                                and 032-GIT
                                   (Urban)
366                                UDT-OC48 Entrance      Under                NN            NN             NN
                                                          development
                                   Facilities Zone 1
                                   (Rural)
367                                UDT-OC48 Entrance      Under                NN            NN             NN
                                                          development
                                   Facilities Zone 2
                                   (Suburban)
368                                UDT-OC48 Entrance      Under                NN            NN             NN
                                                          development
                                   Facilities Zone 3
                                   (Urban)
369                                UDT-2-Wire VG Interoffice  ULN2S            NN            NN             NN
                                   Transport,  First Mile -
                                   Zone 1 (Rural)
370                                UDT-2-Wire VG Interoffice  ULN2S            NN            NN             NN
                                   Transport,  First Mile -
                                   Zone 2 (Suburban)
371                                UDT-2-Wire VG Interoffice  ULN2S            NN            NN             NN
                                   Transport,  First Mile -
                                   Zone 3 (Urban)
372                                UDT-2-Wire VG Interoffice  ULN2S            NN            NN             NN
                                   Transport,  First Mile -
                                   Interzone
373                                UDT-2-Wire VG Interoffice  ULN2S            NN            NN             NN
                                   Transport, Each
                                   Additional Mile -Zone 1
                                   (Rural)
374                                UDT-2-Wire VG Interoffice  ULN2S            NN            NN             NN
                                   Transport, Each
                                   Additional Mile -Zone 2
                                   (Suburban)
375                                UDT-2-Wire VG Interoffice  ULN2S            NN            NN             NN
                                   Transport, Each
                                   Additional Mile -Zone 3
                                   (Urban)
376                                UDT-2-Wire VG Interoffice  ULN2S            NN            NN             NN
                                   Transport, Each
                                   Additional Mile -Interzone
377                                UDT-4-Wire VG Interoffice  ULN4S            NN            NN             NN
                                   Transport,  First Mile -
                                   Zone 1 (Rural)
378                                UDT-4-Wire VG Interoffice  ULN4S            NN            NN             NN
                                   Transport,  First Mile -
                                   Zone 2 (Suburban)
379                                UDT-4-Wire VG Interoffice  ULN4S            NN            NN             NN
                                   Transport,  First Mile -
                                   Zone 3 (Urban)
380                                UDT-4-Wire VG Interoffice  ULN4S            NN            NN             NN
                                   Transport,  First Mile -
                                   Interzone
381                                UDT-4-Wire VG Interoffice  ULN4S            NN            NN             NN
                                   Transport, Each
                                   Additional Mile -Zone 1
                                   (Rural)
382                                UDT-4-Wire VG Interoffice  ULN4S            NN            NN             NN
                                   Transport, Each
                                   Additional Mile -Zone 2
                                   (Suburban)
383                                UDT-4-Wire VG Interoffice  ULN4S            NN            NN             NN
                                   Transport, Each
                                   Additional Mile -Zone 3
                                   (Urban)
384                                UDT-4-Wire VG Interoffice  ULN4S            NN            NN             NN
                                   Transport, Each
                                   Additional Mile -Interzone
385  01/03/01                      UDT-DS1 Interoffice        ULNHS       $    51.89   $   136.65    $   78.80      KS  Dkt 149-GIT
                                   Transport, First Mile -                                                          and 032-GIT
                                   Zone 1 (Rural)
386  01/03/01                      UDT-DS1 Interoffice        ULNHS       $    44.59   $   136.65    $   78.80      KS  Dkt 149-GIT
                                   Transport, First Mile -                                                          and 032-GIT
                                   Zone 2 (Suburban)
387  01/03/01                      UDT-DS1 Interoffice        ULNHS       $    40.78   $   136.65    $   78.80      KS  Dkt 149-GIT
                                   Transport, First Mile -                                                          and 032-GIT
                                   Zone 3 (Urban)
388  01/03/01                      UDT-DS1 Interoffice        ULNHS       $    57.49   $   136.65    $   78.80      KS  Dkt 149-GIT
                                   Transport, First Mile -                                                          and 032-GIT
                                   Interzone
----------------------------------------------------------------------------------------------------------------------------------


                                                                        11 OF 21

<Page>

NN = Not Negotiated                                             Appendix Pricing
                                                              Schedule of Prices
                                                         Effective Date 10/18/00

       SOUTHWESTERN BELL TELEPHONE COMPANY/BIRCH TELECOM OF KANSAS, INC.
                                     KANSAS


----------------------------------------------------------------------------------------------------------------------------------
LINE  CHANGE/      RATE ELEMENT              SERVICE            USOCS     RECURRING  NONRECURRING   NONRECURRING   SUBSEQUENT
      UPDATES                                                               RATE      RATE FIRST        RATE         CHANGES
                                                                                                     ADDITIONAL
----------------------------------------------------------------------------------------------------------------------------------
                                                                                            

389                                UDT-DS1 Interoffice         ULNHS     $      3.11      None           None
                                   Transport, Each
                                   Additional Mile - Zone 1
                                   (Rural)
390                                UDT-DS1 Interoffice         ULNHS     $      0.94      None           None
                                   Transport, Each
                                   Additional Mile - Zone 2
                                   (Suburban)
391                                UDT-DS1 Interoffice         ULNHS     $      0.35      None           None
                                   Transport, Each
                                   Additional Mile - Zone 3
                                   (Urban)
392                                UDT-DS1 Interoffice         ULNHS     $      1.03      None           None
                                   Transport, Each
                                   Additional Mile -
                                   Interzone
393  01/03/01                      UDT-DS3 Interoffice         ULNJS          None     $   158.10    $   97.75      KS  Dkt 149-GIT
                                   Transport, First Mile -                                                          and 032-GIT
                                   Zone 1 (Rural)
394  01/03/01                      UDT-DS3 Interoffice         ULNJS      $   596.55   $   158.10    $   97.75      KS  Dkt 149-GIT
                                   Transport, First Mile -                                                          and 032-GIT
                                   Zone 2 (Suburban)
395  01/03/01                      UDT-DS3 Interoffice         ULNJS      $   478.64   $   158.10    $   97.75      KS  Dkt 149-GIT
                                   Transport, First Mile -                                                          and 032-GIT
                                   Zone 3 (Urban)
396  01/03/01                      UDT-DS3 Interoffice         ULNJS      $   794.49   $   158.10    $   97.75      KS  Dkt 149-GIT
                                   Transport, First Mile -                                                          and 032-GIT
                                   Interzone
397                                UDT-DS3 Interoffice         ULNJS          None        None           None
                                   Transport, Each
                                   Additional Mile - Zone 1
                                   (Rural)
398                                UDT-DS3 Interoffice         ULNJS      $    17.51      None           None
                                   Transport, Each Additional
                                   Mile - Zone 2
                                   (Suburban)
399                                UDT-DS3 Interoffice         ULNJS      $    12.83      None           None
                                   Transport, Each Additional
                                   Mile - Zone 3
                                   (Urban)
400                                UDT-DS3 Interoffice         ULNJS      $    14.43      None           None
                                   Transport, Each
                                   Additional Mile -
                                   Interzone
401  01/03/01                      UDT-OC3 Interoffice         ULNKS          None     $   168.90    $   97.50      KS  Dkt 149-GIT
                                   Transport, First Mile -                                                          and 032-GIT
                                   Zone 1 (Rural)
402  01/03/01                      UDT-OC3 Interoffice         ULNKS      $ 3,805.16   $   168.90    $   97.50      KS  Dkt 149-GIT
                                   Transport, First Mile -                                                          and 032-GIT
                                   Zone 2 (Suburban)
403  01/03/01                      UDT-OC3 Interoffice         ULNKS      $ 4,868.35   $   168.90    $   97.50      KS  Dkt 149-GIT
                                   Transport, First Mile -                                                          and 032-GIT
                                   Zone 3 (Urban)
404  01/03/01                      UDT-OC3 Interoffice         ULNKS      $ 8,545.03   $   168.90    $   97.50      KS  Dkt 149-GIT
                                   Transport, First Mile -                                                          and 032-GIT
                                   Interzone
405                                UDT-OC3 Interoffice         ULNKS          None        NN              NN
                                   Transport, Each
                                   Additional Mile - Zone 1
                                   (Rural)
406                                UDT-OC3 Interoffice         ULNKS      $    49.61      NN              NN
                                   Transport, Each
                                   Additional Mile - Zone 2
                                   (Suburban)
407                                UDT-OC3 Interoffice         ULNKS      $    98.07      NN              NN
                                   Transport, Each
                                   Additional Mile - Zone 3
                                   (Urban)
408                                UDT-OC3 Interoffice         ULNKS      $    57.60      NN              NN
                                   Transport, Each
                                   Additional Mile -
                                   Interzone
409  01/03/01                      UDT-OC12 Interoffice        ULNLS          None     $   168.90    $   97.50      KS  Dkt 149-GIT
                                   Transport, First Mile -                                                          and 032-GIT
                                   Zone 1 (Rural)
410  01/03/01                      UDT-OC12 Interoffice        ULNLS      $ 9,212.52   $   168.90    $   97.50      KS  Dkt 149-GIT
                                   Transport, First Mile -                                                          and 032-GIT
                                   Zone 2 (Suburban)
411  01/03/01                      UDT-OC12 Interoffice        ULNLS      $ 6,373.85   $   168.90    $   97.50      KS  Dkt 149-GIT
                                   Transport, First Mile -                                                          and 032-GIT
                                   Zone 3 (Urban)
412  01/03/01                      UDT-OC12 Interoffice        ULNLS      $ 10,720.3   $   168.90    $   97.50      KS  Dkt 149-GIT
                                   Transport, First Mile -                                                          and 032-GIT
                                   Interzone
413                                UDT-OC12 Interoffice        ULNLS          None        NN              NN
                                   Transport, Each
                                   Additional Mile - Zone 1
                                   (Rural)
414                                UDT-OC12 Interoffice        ULNLS      $    93.40      NN              NN
                                   Transport, Each
                                   Additional Mile - Zone 2
                                   (Suburban)
415                                UDT-OC12 Interoffice        ULNLS      $   113.84      NN              NN
                                   Transport, Each
                                   Additional Mile - Zone 3
                                   (Urban)
416                                UDT-OC12 Interoffice        ULNLS      $    72.18      NN             NN
                                   Transport, Each
                                   Additional Mile -
                                   Interzone
----------------------------------------------------------------------------------------------------------------------------------


                                                                        12 OF 21

<Page>

NN = Not Negotiated                                             Appendix Pricing
                                                              Schedule of Prices
                                                         Effective Date 10/18/00

       SOUTHWESTERN BELL TELEPHONE COMPANY/BIRCH TELECOM OF KANSAS, INC.
                                     KANSAS


----------------------------------------------------------------------------------------------------------------------------------
LINE  CHANGE/      RATE ELEMENT              SERVICE            USOCS     RECURRING  NONRECURRING   NONRECURRING   SUBSEQUENT
      UPDATES                                                               RATE      RATE FIRST       RATE         CHANGES
                                                                                                     ADDITIONAL
----------------------------------------------------------------------------------------------------------------------------------
                                                                                            


417                                UDT-OC48 Interoffice         ULNNS       None           NN             NN
                                   Transport, First Mile -
                                   Zone 1 (Rural)
418                                UDT-OC48 Interoffice         ULNNS    $  25,522.0       NN             NN
                                   Transport, First Mile -
                                   Zone 2 (Suburban)
419                                UDT-OC48 Interoffice         ULNNS    $  19,897.3       NN             NN
                                   Transport, First Mile -
                                   Zone 3 (Urban)
420                                UDT-OC48 Interoffice         ULNNS    $  22,647.5       NN             NN
                                   Transport, First Mile -
                                   Interzone
421                                UDT-OC48 Interoffice         ULNNS        None          NN             NN
                                   Transport, Each
                                   Additional Mile - Zone 1
                                   (Rural)
422                                UDT-OC48 Interoffice         ULNNS    $    818.57       NN             NN
                                   Transport, Each
                                   Additional Mile - Zone 2
                                   (Suburban)
423                                UDT-OC48 Interoffice         ULNNS    $    589.73       NN             NN
                                   Transport, Each
                                   Additional Mile - Zone 3
                                   (Urban)
424                                UDT-OC48 Interoffice         ULNNS    $    129.73       NN             NN
                                   Transport, Each
                                   Additional Mile -
                                   Interzone
425            Dedicated           2-wire VG to Collocation     UCXV2          NN          NN             NN
               Transport Cross
               Connect
426                                4-wire VG to Collocation     UCXV4          NN          NN             NN
427  01/03/01                      DS1 to Collocation           UCXHX    $      7.12   $    98.50    $   80.30      KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
428  01/03/01                      DS3 to Collocation           UCXJX    $     23.61   $    68.75    $   50.55      KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
429  01/03/01                      OC3 to Collocation           UCXKX    $      2.41   $    56.50    $   44.10      KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
430  01/03/01                      OC12 to Collocation          UCXLX    $      2.41   $    56.50    $   44.10      KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
431  01/03/01                      OC48 to Collocation          UCXNX    $      2.41      TBD             TBD       KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
432                                2-wire VG to DCS/NRS         Under          NN          NN             NN
                                                             development
433                                4-wire VG to DCS/NRS         Under          NN          NN             NN
                                                             development
434                                DS1 to DCS/NRS               Under          NN          NN             NN
                                                             development
435                                DS3 to DCS/NRS               Under          NN          NN             NN
                                                             development
436                                OC3 to DCS/NRS               Under          NN          NN             NN
                                                             development
437                                OC12 to DCS/NRS              Under          NN          NN             NN
                                                             development
438                                OC48 to DCS/NRS              Under          NN          NN             NN
                                                             development
439                                DS1 to Mux                   Under          NN          NN             NN
                                                             development
440                                DS3 to MUX                   Under          NN          NN             NN
                                                             development
441            Network             DSO DCS Port              (UDU5X)and       rNN          NN             NN
               Reconfigeration                               development
               Service
442                                DSO DS1 Port                UDUDX           NN          NN             NN
443                                DSO DS3 Port                (UDU3X)        rNN          NN             NN
                              dev  elopment
444                                DCS Establishment           SEPU3           NN          NN             NN
445                                Database Modification       NR9U4           NN          NN             NN
446                                DCS/NRS with 2-wire cross   Under           NN          NN             NN
                                   connect to Collocation      development
447                                DCS/NRS with 4-wire cross   Under           NN          NN             NN
                                   connect to Collocation      development
448                                Mux with 2-wire cross       Under           NN          NN             NN
                                   connect to DCS              development
449                                Mux with 4-wire cross       Under           NN          NN             NN
                                   connect to DCS              development
450            Multiplexing        DS1 to VG                   UM4BX      $   119.03       NN             NN
451                                DS1 to Voice Grade 100%   Not Available$ 1,214.09       NN             NN
452                                DS3 to DS1                   UM4AX     $   359.83       NN             NN
----------------------------------------------------------------------------------------------------------------------------------


                                                                        13 OF 21

<Page>

NN = Not Negotiated                                             Appendix Pricing
                                                              Schedule of Prices
                                                         Effective Date 10/18/00

       SOUTHWESTERN BELL TELEPHONE COMPANY/BIRCH TELECOM OF KANSAS, INC.
                                     KANSAS


----------------------------------------------------------------------------------------------------------------------------------
LINE  CHANGE/      RATE ELEMENT              SERVICE            USOCS     RECURRING  NONRECURRING   NONRECURRING   SUBSEQUENT
      UPDATES                                                              RATE       RATE FIRST    RATE           CHANGES
                                                                                                    ADDITIONAL
----------------------------------------------------------------------------------------------------------------------------------
                                                                                            


453                                Mux with 2-wire cross     Under             NN         NN           NN
                                                             development
                                   connect to Collocation
454                                Mux with 4-wire cross     Under             NN         NN           NN
                                                             development
                                   connect to Collocation
455                                OC-3 to 1-84 DS1s         not               NN         NN           NN
                                                             developed
456                                OC-3 to 1-3 DS3              UM4HX          NN         NN           NN
457                                OC-3 to 1-3 EC-1          not developed     NN         NN           NN
458                                OC-12 to 1-12 DS3            UMULX          NN         NN           NN
459                                OC-12 to 1-12 EC-1/STS-1  not developed     NN         NN           NN
460                                OC-12 to 1-4 OC-3/OC-3    not developed     NN         NN           NN
461            SS7                 SS7 Link Cross Connect -    5-state      $  47.33   $   100.52    $   82.47
                                   DS0                          IBIS
462                                SS7 Link Cross Connect -    5-state      $  34.13   $    90.52    $   72.48
                                   DS1                          IBIS
463                                STP to SWBT MDF - DSO       5-state      $  47.33   $   100.03    $   81.99
                                   IBIS                         IBIS
464                                STP to SWBT DSX Frame-DS1   5-state      $  34.13   $    90.52    $   72.48
                                   IBIS                         IBIS
465                                STP Port Termination       IBIS billed   $  929.08  $   162.27     None
466                                STP Access Link-1.544 Mbp  IBIS billed      NN         NN           NN
467                                STP Access Link-56.Kbps    IBIS billed      NN         NN           NN
                                   (fixed)
468                                STP Access Link-56.Kbps    IBIS billed      NN         NN           NN
                                   (per mile)
469                                SS7 Transport per Octet    IBIS billed $ 0.0000002    None         None
470  01/03/01                      Signaling Point Code       IBIS billed     None     $    50.40     None          KS  Dkt 149-GIT
                                   Addition                                                                         and 032-GIT
471                                Global Title Translation  Under devel-     None     $     7.63     None
                                   Addition (GTT)              opment
472                                SS7 Kansas Signaling,     Not Avail-   $   273.42      NN           NN
                                   Octets Per Call             able
473            Line Information    Validation Query (Calling not applic-  $ 0.003690     None         None
               Database (LIDB)     Card and BNS)               able
474                                Validation Query (SMS)    not applic-  $ 0.000339     None         None
                                                               able
475                                Validation Query (Sleuth  not applic-  $ 0.006435     None         None
                                   Cost)                       able
476                                OLNS Query (Includes SMS)                   NN         NN           NN
477                                CNAM Query (Includes SMS) not applic-  $ 0.000214     None         None
                                                               able
478                                Query Transport (Applies  not applic-       NN         NN           NN
                                   to Valadation, OLNS &       able
                                   CNAM)
479  01/03/01                      Service Order Cost        not applic-      None     $    12.70     None          KS  Dkt 149-GIT
                                                               able                                                     and 032-GIT
480  01/03/01                      Service Establishment     not applic-      None     $    50.40     None          KS  Dkt 149-GIT
                                   Charge                      able                                                     and 032-GIT
481            800 Database        Toll Free Database Query  not applic-  $ 0.000160     None         None
                                                               able
482                                Call Handling and         not applic-  $ 0.000040     None         None
                                   Destination                  able
483                                Desiginated 10 digit      Under deve-      None       None         None
                                   Translation                 lopment
484                                Call Valadition Rate      Under deve-      None       None         None
                                                               lopment
485  01/03/01  Service Order       ManualNew - Simple           NRBUQ         None     $    12.35     None          KS  Dkt 149-GIT
               Charges                                                                                              and 032-GIT
486  01/03/01                      Manual Change - Simple       NRBUO         None     $    12.35     None          KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
487  01/03/01                      Manual Record - Simple       NRBUU         None     $    12.35     None          KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
488  01/03/01                      Manual Disconnect - Simple   NRBUW         None     $    12.35     None          KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
489  01/03/01                      Manual Suspend - Simple      NRBJZ         None     $    12.35     None          KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
490  01/03/01                      Manual Restore - Simple      NRBJ9         None     $    12.35     None          KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
491  01/03/01                      Manual Expedited - Simple   (NRBUQ)        None     $    12.35     None          KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
492  01/03/01                      Manual CustomerNot Ready    (NRBUQ)        None     $    12.35     None          KS  Dkt 149-GIT
                                   - Simple                                                                         and 032-GIT
493  01/03/01                      Manual Due Date Change or   (NRBUQ)        None     $    12.35     None          KS  Dkt 149-GIT
                                   Cancellation - Simple                                                            and 032-GIT
494  01/03/01                      ManualNew - Complex          NRBUR         None     $    12.35     None          KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
----------------------------------------------------------------------------------------------------------------------------------


                                                                        14 OF 21

<Page>

NN = Not Negotiated                                             Appendix Pricing
                                                              Schedule of Prices
                                                         Effective Date 10/18/00

       SOUTHWESTERN BELL TELEPHONE COMPANY/BIRCH TELECOM OF KANSAS, INC.
                                     KANSAS


----------------------------------------------------------------------------------------------------------------------------------
LINE  CHANGE/      RATE ELEMENT              SERVICE            USOCS     RECURRING  NONRECURRING   NONRECURRING   SUBSEQUENT
      UPDATES                                                              RATE       RATE FIRST       RATE          CHANGES
                                                                                                    ADDITIONAL
----------------------------------------------------------------------------------------------------------------------------------
                                                                                              

495  01/03/01                      Manual Change - Complex       NRBUP        None     $    12.35      None         KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
496  01/03/01                      Manual Record - Complex       NRBUV        None     $    12.35      None         KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
497  01/03/01                      Manual Disconnect -           NRBUX        None     $    12.35      None         KS  Dkt 149-GIT
                                   Complex                                                                          and 032-GIT
498  01/03/01                      Manual Suspend - Complex      NRBJ7        None     $    12.35      None         KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
499  01/03/01                      Manual Restore - Complex      NRBJ8        None     $    12.35      None         KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
500  01/03/01                      Manual Expedited - Complex   (NRBUR)       None     $    12.35      None         KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
501  01/03/01                      Manual CustomerNot Ready     (NRBUR)       None     $    12.35      None         KS  Dkt 149-GIT
                                   - Complex                                                                        and 032-GIT
502  01/03/01                      Manual Due Date Change or    (NRBUR)       None     $    12.35      None         KS  Dkt 149-GIT
                                   Cancellation - Complex                                                           and 032-GIT
503  01/03/01                      ElectronicNew - Simple        NR9W2        None     $     2.35      None         KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
504  01/03/01                      ElectronicNew - Complex       NRBAW        None     $     2.35      None         KS
                                                                                                                    Docket-97CCC-149
                                                                                                                    Change US and Pr
505  01/03/01                      Electronic Change - Simple    NR9GG        None     $     2.35      None         KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
506  01/03/01                      Electronic Record - Simple    NR9GU        None     $     2.35      None         KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
507  01/03/01                      Electronic Disconnect -       NR9GZ        None     $     2.35      None         KS  Dkt 149-GIT
                                   Simple                                                                           and 032-GIT
508  01/03/01                      Electronic Suspend -          NRBJ5        None     $     2.35      None         KS  Dkt 149-GIT
                                   Simple                                                                           and 032-GIT
509  01/03/01                      Electonic Restore - Simple    NRBJ6        None     $     2.35      None         KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
510  01/03/01                      Electronic Expedited -       (NR9W2)       None     $     2.35      None         KS  Dkt 149-GIT
                                   Simple                                                                           and 032-GIT
511  01/03/01                      Electronic CustomerNot       (NR9W2)       None     $     2.35      None         KS  Dkt 149-GIT
                                   Ready - Simple                                                                   and 032-GIT
512  01/03/01                      Electronic Due Date          (NR9W2)       None     $     2.35      None         KS  Dkt 149-GIT
                                   Change or Cancellation                                                           and 032-GIT
                                   Simple - Electronic
513                                PIC Change Charge             NRBL9        None     $     5.00      None
514                                UNE Combining Charge          R2RLP         NN          NN           NN
515                                ADSL Merger Promo--Manual     NRBAY         NN          NN           NN
                                   Service Order Charge
516                                ADSL Merger                   NRBAW         NN          NN           NN
                                   Promo--Electronic Service
                                   Order Charge
517            OTHER
518            Directory           Directory Assistance (DA)   not        $ 0.340357     None          None
               Assistance          - per call                  applicable
519                                Directory Assistance Call   not        $ 0.027497     None          None
                                   Completion (DACC) - per     applicable
                                   call
520                                Directory                              $     0.65     None          None
                                   AssistanceNationwide
                                   Listing Services (NLS)
521                                Directory                   not        $     1.60     None          None
                                   AssistanceNon-Pub           applicable                                         Emergency Service
522                                Directory Assistance -      NRBDG          None     $ 1,989.84      None
                                   Facility Based Branding -
                                   Initial/Subsequent Load
523                                Directory Assistance -       ZZUCB     $  0.00329     None          None
                                   Facility Based Branding
                                   Per call (Line # based*)
524                                *When unbundled switching
                                   is used or when more than
                                   one brand required on
                                   same trunk group
525                                Directory Assistance -      NRBDL          None     $ 2,708.34      None
                                   Facilities Based Rate
                                   Reference Initial Load
                                   Directory Assistance Rate   NRBDM          None     $ 1,133.96      None
                                   Reference - Facilities
                                   Based - Subsequent
                                   Reference Loan/Rater Load
526                                Directory Assistance        Not             NN         NN            NN
                                   Listings (DAL)-Initial      applicable
                                   Load, per listing
527                                Directory Assistance        Not             NN         NN            NN
                                   Listings (DAL)-Update,      applicable
                                   per listing
----------------------------------------------------------------------------------------------------------------------------------
                                                                        15 OF 21

<Page>

NN = Not Negotiated                                             Appendix Pricing
                                                              Schedule of Prices
                                                         Effective Date 10/18/00

       SOUTHWESTERN BELL TELEPHONE COMPANY/BIRCH TELECOM OF KANSAS, INC.
                                     KANSAS




----------------------------------------------------------------------------------------------------------------------------------
LINE  CHANGE/      RATE ELEMENT              SERVICE            USOCS     RECURRING  NONRECURRING   NONRECURRING   SUBSEQUENT
      UPDATES                                                              RATE       RATE FIRST    RATE           CHANGES
                                                                                                    ADDITIONAL
----------------------------------------------------------------------------------------------------------------------------------
                                                                                            

528  01/03/01                      Directory Assistance        not             NN      $     2.60      None         KS  Dkt 149-GIT
                                   Listings (DAL)-Non-Pub      applicable                                            and 032-GIT
                                   Emergency Message Service
529            Operator Services   Operated Services - Fully   not        $  0.11890    None           None
                                   Automated Call Processing   applicable
                                   (Per completed automated
                                   call)
530                                Operator Services -                    $  0.01520    None           None
                                   Operator Assisted Call
                                   Processing (Per work
                                   second)
531                                Operator Services -         (NRBDG)     None        $ 1,989.84      None
                                   Facilities Based Branding
                                   Initial/Subsequent Load
532                                Operator Services -         (ZZUCB)    $  0.00329    None           None
                                   Facilities Based Branding
                                   - Per Call (Line #
                                   based*)
533                                *When unbundled switching
                                   is used or when more than
                                   one brand required on
                                   same trunk group
534                                Operator Services -         (NRBDL)     None        $ 2,708.34      None
                                   Facilities Based Rate
                                   Reference -Initial Load
535                                Operator Services -         (NRBDM)     None        $ 1,133.96      None
                                   Facilities Based Rate
                                   Reference - Subsequent
                                   Rater Load or Reference
                                   Load
536                                Intralata Message Rating    not             NN          NN             NN
                                   - Rate per initial load     applicable
537                                Intralata Message Rating    not       -     NN          NN             NN
                                   - Rate per subsequent       applicable
                                   changes
538            UNE Account         Name Change                 NR9G2           NN          NN             NN
               Changes--CLECName,
               OCN, ACNA Change
539                                OCN Change                  NR9G3           NN          NN             NN
540                                Name & OCN Change           NR9G4           NN          NN             NN
541                                SpokenName & Repair         NR9G5           NN          NN             NN
                                   Recording
542                                Spoken OCN & Repair         NR9G6           NN          NN             NN
                                   Recording
543            Misc                NXX Migration- Migration    not             None     $10,000.00       None
                                   Charge perNXX               applicable
544                                Porting Optional Calling    not             NN          NN             NN
                                   AreaNumbers                 applicable
545                                UNE Electronic Billing      ASBS       $    0.080      None           None
                                   Information Data (daily
                                   usage) per message
546            BCR                 Per interstate local        not             NN          NN             NN
                                   message                     applicable
547                                Per local message           not             NN          NN             NN
                                                               applicable
548            Recording           Recording/Access Usage      not             NN          NN             NN
                                   Record                      applicable
549                                Assembly and Editing        not             NN          NN             NN
                                   per Message                 applicable
550                                Rating per Message          not             NN          NN             NN
                                                               applicable
551                                Message Processing per      not             NN          NN             NN
                                   Message                     applicable
552                                Provision of Message        not             NN          NN             NN
                                   Detail per record           applicable
553                                Source Info Provided        not             NN          NN             NN
                                   per record furnished -      applicable
                                   meet point billing
                                   applicable
554                                Source Info Provided        not             NN          NN             NN
                                   per record furnished -      applicable
                                   meet point billingNot
                                   applicable
555            Hosting             Billable Message Records    not             NN          NN             NN
                                   and /or access usage        applicable
                                   records - per Record
                                   Charge
556                                Hosting: Per Record         not             NN          NN             NN
                                   Charge For Full Status      applicable
                                   RAO
                                   Company-HostingNetwork
                                   Company
557                                Hosting: Per Record         not             NN          NN             NN
                                   Charge For Full Status      applicable
                                   RAO Company-National
                                   CMDSNetwork
----------------------------------------------------------------------------------------------------------------------------------


                                                                        16 OF 21

<Page>

NN = Not Negotiated                                             Appendix Pricing
                                                              Schedule of Prices
                                                         Effective Date 10/18/00

       SOUTHWESTERN BELL TELEPHONE COMPANY/BIRCH TELECOM OF KANSAS, INC.
                                     KANSAS



----------------------------------------------------------------------------------------------------------------------------------
LINE  CHANGE/      RATE ELEMENT              SERVICE            USOCS     RECURRING  NONRECURRING   NONRECURRING   SUBSEQUENT
      UPDATES                                                              RATE       RATE FIRST    RATE           CHANGES
                                                                                                    ADDITIONAL
----------------------------------------------------------------------------------------------------------------------------------
                                                                                            

558                                Hosting: Per Record         not             NN          NN               NN
                                                               applicable
                                   Charge ForNon-Full Status
                                   RAO Company-National
                                   CMDSNetwork
559                                Hosting: Per Record         not             NN          NN               NN
                                                               applicable
                                   Charge ForNon-Full Status
                                   RAO Company-Hosting
                                   CompanyNetwork
560            Clearinghouse       CH processing charge for    not        $    0.020      None             None
                                   service - per originated    applicable
                                   CH record
561                                CH billing message - per    not        $    0.050      None             None
                                   message                     applicable
562            E911                  Feature per 1000 lines    Not        $    0.039      None             None
                                   - ANI to SWBT PSAP          applicable
563                                  Feature per 1000 lines    Not            See Tariff  None             None
                                   - ANI toNon-SWBT PSAP       applicable     Rates
564                                  Feature per 1000 lines    Not        $    0.245      None             None
                                   - ANI and Selective         applicable
                                   Routing to SWBT PSAP
565                                  Feature per 1000 lines    Not            See Tariff  None             None
                                   - ANI and Selective         applicable     Rates
                                   Routing toNon-SWBT PSAP
566                                  Feature per 1000 lines    Not        $    41.49      None             None
                                   - ANI and ALI to SWBT PSAP  applicable
567                                  Feature per 1000 lines    Not            See Tariff  None             None
                                   - ANI and ALI toNon-SWBT    applicable     Rates
                                   PSAP
568                                  Feature per 1000 lines    Not        $    41.63      None             None
                                   - ANI, SR and ALI to SWBT   applicable
                                   PSAP
569                                  Feature per 1000 lines    Not            See Tariff  None             None
                                   - ANI, SR and ALI           applicable     Rates
                                   toNon-SWBT PSAP
570                                  Trunk Charge per channel  Not        $    22.86      None             None
                                                               applicable
571  01/03/01  Maintenance of      Basic Time - per half hour  MVV            None     $    62.34    $   29.97      KS  Dkt 149-GIT
               Service Charges                                                                                      and 032-GIT
               &Non-Productive
               Dispatch
572  01/03/01                      Overtime - per half hour    MVV            None     $    77.80    $   37.70      KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
573  01/03/01                      Premium Time - per half     MVV            None     $    93.25    $   45.42      KS  Dkt 149-GIT
                                   hour                                                                             and 032-GIT
574  01/03/01  Time and            Basic Time - per half hour  ALK, ALT,AL    None     $    62.34    $   29.97      KS  Dkt 149-GIT
               Materials Charges                                                                                    and 032-GIT
575  01/03/01                      Overtime - per half hour    ALK, ALT,AL    None     $    77.80    $   37.70      KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
576  01/03/01                      Premium Time - per half     ALK, ALT,AL    None     $    93.25    $   45.42      KS  Dkt 149-GIT
                                   hour                                                                             and 032-GIT
577            White Pages         Initial Order, Initial      Not            None     $     1.11          None
                                   Delivery:  Delivered in     applicable
                                   Bulk to LSP, Per Book
                                   (Zone 1 - Rural)
578                                Initial Order, Initial      Not applicable None     $     0.91          None
                                   Delivery:  Delivered in
                                   Bulk to LSP, Per Book
                                   (Zone 2 - Suburban)
579                                Initial Order, Initial      Not            None     $     2.93          None
                                   Delivery:  Delivered in     applicable
                                   Bulk to LSP, Per Book
                                   (Zone 3 - Urban)
580                                Initial Order, Initial      Not            None     $     1.51          None
                                   Delivery:  Delivered in     applicable
                                   Bulk to LSP End User, Per
                                   Book (Zone 1 - Rural)
581                                Initial Order, Initial      Not            None     $     1.40          None
                                   Delivery:  Delivered in     applicable
                                   Bulk to LSP End User, Per
                                   Book (Zone 2 - Suburban)
582                                Initial Order, Initial      Not            None     $     3.72          None
                                   Delivery:  Delivered in     applicable
                                   Bulk to LSP End User, Per
                                   Book (Zone 3 - Urban)
583                                Subsequent order and        Not            None     $     1.38          None
                                   Delivery, per book (Zone    applicable
                                   1 - Rural)
584                                Subsequent order and        Not            None     $     1.27          None
                                   Delivery, per book (Zone    applicable
                                   2- Suburban)
585                                Subsequent order and        Not            None     $     3.36          None
                                   Delivery, per book (Zone    applicable
                                   3 - Urban)
586                                Additional Book in Excess   Not            None     $    10.00          None
                                   of Initial                  applicable
587                                Option to pay per listing   Not            None     $     0.11          None
                                   per month (Zone 1 -         applicable
                                   Rural):
----------------------------------------------------------------------------------------------------------------------------------


                                                                        17 OF 21

<Page>

NN = Not Negotiated                                             Appendix Pricing
                                                              Schedule of Prices
                                                         Effective Date 10/18/00

       SOUTHWESTERN BELL TELEPHONE COMPANY/BIRCH TELECOM OF KANSAS, INC.
                                     KANSAS



----------------------------------------------------------------------------------------------------------------------------------
LINE  CHANGE/      RATE ELEMENT              SERVICE            USOCS     RECURRING  NONRECURRING   NONRECURRING   SUBSEQUENT
      UPDATES                                                              RATE       RATE FIRST       RATE         CHANGES
                                                                                                    ADDITIONAL
----------------------------------------------------------------------------------------------------------------------------------
                                                                                              

588                                Option to pay per listing   Not            None     $     0.11          None
                                   per month (Zone 2 -         applicable
                                   Suburban):
589                                Option to pay per listing   Not            None     $     0.49          None
                                   per month (Zone 3 -         applicable
                                   Urban):
590                                NRC to Enter or Delete,     Not            None     $     0.33          None
                                   Zone 1                      applicable
591                                NRC to Enter or Delete,     Not            None     $     0.33          None
                                   Zone 2                      applicable
592                                NRC to Enter or Delete,     Not            None     $     0.33          None
                                   Zone 3                      applicable
593                                Including an LSP Page in    Not            None     $    85.17          None
                                   SWBT Directory (One),       applicable
                                   Zone 1
594                                Including an LSP Page in    Not            None     $   104.03          None
                                   SWBT Directory (One),       applicable
                                   Zone 2
595                                Including an LSP Page in    Not            None     $ 1,714.64          None
                                   SWBT Directory (One),       applicable
                                   Zone 3
596            Poles, Ducts, and   Annual Pole Attachment      Not        $     1.75       None            None
               Conduit             Fees: Per Pole              applicable
                                   (cable/telecommunication
                                   services only)
597                                Semiannual Pole             Not             NN           NN              NN
                                   Attachment Fees: Per Pole   applicable
                                   (cable/telecommunication
                                   services only)
598                                Annual Per Foot Conduit     Not        $     0.39       None            None
                                   Occupany Fees: Full         applicable
                                   Duct/Duct Foot
                                   (cable/telecommunications
                                   services only)
599                                Semiannual Per Foot         Not             NN           NN              NN
                                   Conduit Occupany Fees:      applicable
                                   Full Duct/Duct Foot
                                   (cable/telecommunication
                                   services only)
600                                Annual Per Foot Conduit     Not             NN           NN              NN
                                   Occupany Fees: Half         applicable
                                   Duct/Duct Foot
                                   (cable/telecommunications
                                   services only)
601                                Semiannual Per Foot         Not             NN           NN              NN
                                   Conduit Occupany Fees:      applicable
                                   Half Duct/Duct Foot
                                   (cable/telecommunications
                                   services only)
602                                One-time Contract           Not             NN           NN              NN
                                   Administration Fee          applicable
603                                Inner Duct Foot, Per Year   Not        $    0.195       None            None
                                                               applicable
604                                Administrative              Not             NN           NN              NN
                                   Record-Keeping Fee          applicable
605            Dark Fiber          Per First Mile, Per Month   Not        $   316.00        NN              NN
                                                               applicable
606                                Per Fiber Foot for          ULNCF      $ 0.059848        NN              NN
                                   Lengths Less Than One Mile
607                                Per Additional Mile Per     Not        $    24.00        NN              NN
                                   Month                       applicable
608                                Per Fiber Foot for          Not        $ 0.004545        NN              NN
                                   Additional Lengths Over     applicable
                                   One Mile
609            Dark Fiber Cross    (CategoryNot Stated)        Not             NN      $     6.16    $    6.16
               Connect                                         applicable
610                                CategoryNot Stated)         Not             NN      $    42.52    $   28.41
611            RECIPROCAL                                      applicable
               COMPENSATION
612            Tandem Switching    Tandem Switching Per        not        $ 0.000789       None            None
                                   Minute of Use               applicable
613            Common Transport    Common Transport            not        $ 0.000196       None            None
                                   -Termination per Minute     applicable
                                   of  Use Zone 1 (Rural)
614                                Common Transport            not        $ 0.000171       None            None
                                   -Termination per Minute     applicable
                                   of  Use Zone 2
                                   (Suburban)
615                                Common Transport-           not        $ 0.000157       None            None
                                   Termination per Minute      applicable
                                   of  Use Zone 3 (Urban)
616                                Common Transport-           not        $ 0.000186       None            None
                                   Termination per Minute      applicable
                                   of  Use Interzone
617                                Common                      not        $ 0.000006       None            None
                                   Transport-Facilites per     applicable
                                   Minute, per Mile Zone 1
                                   (Rural)
618                                Common                      not        $ 0.000003       None            None
                                   Transport-Facilites per     applicable
                                   Minute, per Mile Zone 2
                                   (Suburban)
----------------------------------------------------------------------------------------------------------------------------------


                                                                        18 OF 21

<Page>

NN - Not Negotiated                                             Appendix Pricing
                                                              Schedule of Prices
                                                         Effective Date 10/18/00

       SOUTHWESTERN BELL TELEPHONE COMPANY/BIRCH TELECOM OF KANSAS, INC.
                                     KANSAS



----------------------------------------------------------------------------------------------------------------------------------
LINE  CHANGE/      RATE ELEMENT              SERVICE            USOCS     RECURRING  NONRECURRING   NONRECURRING   SUBSEQUENT
      UPDATES                                                              RATE       RATE FIRST    RATE           CHANGES
                                                                                                    ADDITIONAL
----------------------------------------------------------------------------------------------------------------------------------
                                                                                            

619                                Common                      not        $ 0.000001     None           None
                                   Transport-Facilites per     applicable
                                   Minute, per Mile Zone 3
                                   (Urban)
620                                Common                      not        $ 0.000001     None           None
                                   Transport-Facilites per     applicable
                                   Minute, per Mile
                                   Interzone
621            Local Switching     Local Switching-Per         not        $ 0.002530     None           None
                                   Originating or              applicable
                                   Terminating MOU Zone 1
                                   (Rural)
622                                Local Switching-Per         not        $ 0.001690     None           None
                                   Originating or              applicable
                                   Terminating MOU Zone 2
                                   (Suburban)
623                                Local Switching-Per         not        $ 0.001310     None           None
                                   Originating or              applicable
                                   Terminating MOU Zone 3
                                   (Urban)
624            Transiting          Transiting-Zone 1 (Rural)   not        $ 0.001027     None           None
                                                               applicable
625                                Transiting-Zone 2           not        $ 0.000981     None           None
                                   (Suburban)                  applicable
626                                Transiting-Zone 3 (Urban)   not        $ 0.000953     None           None
                                                               applicable
627                                Transiting-OCA (Optional    not        $    0.004     None           None
                                   Area)                       applicable
628                                Transiting - Out of Region  not        $    0.006     None           None
                                                               applicable
630            OCA                 OCA Transport &             not             NN         NN             NN
                                   Termination                 applicable
629                                Optional EASNumber Ported   not        $     8.00     None           None
631            OTHER RESALE                                    applicable
632                                Electronic Billing          ASBS       $    0.003     None           None
                                   Information Data (daily
                                   usage) per message
633                                Slamming Investigation Fee  CRIS           None     $     6.83    $    6.83
634                                Local Discount Report       CRIS       $     0.08     None           None
                                   (LDR) per WTN
635                                Simple conversion charge    CRIS            NN         NN             NN
                                   per billableNumber
636                                Electronic conversion       CRIS           None     $     5.00       None
                                   orders per billableNumber
637                                Complex conversion orders   CRIS            NN         NN             NN
                                   per billableNumber
638                                SWBT transmittal of CLEC                    NN         NN             NN
                                   end-user listing to 3rd
                                   party pub, per
                                   occurrence, per dir.
                                   Publisher
639                                OS/DA Reseller Branding -   NRBDG          None     $ 1,388.46       None
                                   Initial Load/Subsequent
                                   Load
640                                OS/DA Reseller Branding     ZZUCB      $   0.0200     None           None
                                   - Per Call
641                                OS/DA Reseller Rate         NRBDL          None     $ 2,347.10       None
                                   Reference - Initial Load
642                                OS/DA Reseller Rate         NRBDM          None     $ 1,028.61       None
                                   Reference - Subsequent
                                   Rater Load or Reference
                                   Load

                       I           INTERIM PRICE SUBJECT TO
                                   TRUE-UP PENDING FURTHER
                                   KCC REVIEW IN DKT.NO.
                                   01-GIMT-032-GIT

643                                MERGER COMMITMENT
                                   AMENDMENTS *
644                                LOOPS PROMOTION
645                                2-Wire Analog Promotion
646                                Zone 1 -  Rural             U21*       $    21.40   See NRC rate   See NRC rate
                                                                                       below USOC     below M4
647                                Zone 2 - Suburban           U21*       $    17.50   See NRC rate   See NRCrate
                                                                                       below USOC     below M4
648                                Zone 3 - Urban              U21*       $    17.50   See NRC rate   See NRC rate
                                                                                       below USOC     below M4
649  01/03/01                      2-Wire Analog Promotion     NRBM4           NA      $    28.45    $   13.55      KS  Dkt 149-GIT
                                                                                                                    032-GIT
650                                ADSL PROMOTION
----------------------------------------------------------------------------------------------------------------------------------


                                                                        19 OF 21

<Page>

NN = Not Negotiated                                             Appendix Pricing
                                                              Schedule of Prices
                                                         Effective Date 10/18/00

       SOUTHWESTERN BELL TELEPHONE COMPANY/BIRCH TELECOM OF KANSAS, INC.
                                     KANSAS



----------------------------------------------------------------------------------------------------------------------------------
LINE  CHANGE/      RATE ELEMENT              SERVICE            USOCS     RECURRING  NONRECURRING   NONRECURRING   SUBSEQUENT
      UPDATES                                                              RATE       RATE FIRST    RATE           CHANGES
                                                                                                    ADDITIONAL
----------------------------------------------------------------------------------------------------------------------------------
                                                                                            

651                                ADSL
652                                Zone 1 -  Rural             U2F*       $    26.36   $    22.71    $    9.49
653                                Zone 2 - Suburban           U2F*       $     9.96   $    22.71    $    9.49
654                                Zone 3 - Urban              U2F*       $     7.37   $    22.71    $    9.49
655                                SERVICE ORDER PROMOTION -   NRBAY*          NA      $   245.00         NA
                                   MANUAL
656                                SERVICE ORDER PROMOTION -   NRBAW*      NA          $     5.00         NA
                                   ELECTRONIC
657                                XDSL PROMOTION
658                                PSD #1B  Capable Loop -
                                   2-Wire Very Low-band
                                   Symmetric Technology:
                                   2-Wire Copper "Symmetric
                                   Digital Subscriber Line"
                                   (SDSL)
659  01/03/01                      Zone 1 -  Rural             2SLAX      $    17.51   $    21.34    $   10.16      KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
660  01/03/01                      Zone 2 - Suburban           2SLAX      $    10.23   $    21.34    $   10.16      KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
661  01/03/01                      Zone 3 - Urban              2SLAX      $     8.90   $    21.34    $   10.16      KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
662                                PSD#2  Capable Loop -
                                   2-Wire Low-band Symmetric
                                   Technology
663  01/03/01                      Zone 1 -  Rural             2SLCX      $    17.51   $    21.34    $   10.16      KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
664  01/03/01                      Zone 2 - Suburban           2SLCX      $    10.23   $    21.34    $   10.16      KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
665  01/03/01                      Zone 3 - Urban              2SLCX      $     8.90   $    21.34    $   10.16      KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
666                                PSD#3A  Capable Loop -
                                   Mid-band Symmetric
                                   Technology:  2-Wire
                                   Mid-Band Symmetric
                                   Technology
667  01/03/01                      Zone 1 -  Rural             2SLBX      $    17.51   $    21.34    $   10.16      KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
668  01/03/01                      Zone 2 - Suburban           2SLBX      $    10.23   $    21.34    $   10.16      KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
669  01/03/01                      Zone 3 - Urban              2SLBX      $     8.90   $    21.34    $   10.16      KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
670                                PSD#3B  Capable Loop -
                                   Mid-band Symmetric
                                   Technology: 4-Wire
                                   Mid-Band Symmetric
                                   Technology
671  01/03/01                      Zone 1 -  Rural             4SL1X      $    31.32   $    37.50    $   17.25      KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
672  01/03/01                      Zone 2 - Suburban           4SL1X      $    17.96   $    37.50    $   17.25      KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
673  01/03/01                      Zone 3 - Urban              4SL1X      $    14.58   $    37.50    $   17.25      KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
674                                PSD#4  Capable Loop -
                                   2-Wire High-band
                                   Symmetric Technology
675  01/03/01                      Zone 1 -  Rural             2SLDX      $    17.51   $    21.34    $   10.16      KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
676  01/03/01                      Zone 2 - Suburban           2SLDX      $    10.23   $    21.34    $   10.16      KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
677  01/03/01                      Zone 3 - Urban              2SLDX      $     8.90   $    21.34    $   10.16      KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
678                                PSD#5  Capable Loop -
                                   2-Wire Asymmetrical
                                   Digital Subscriber Line
                                   Technology
679                                Zone 1 -  Rural             U2F*       $    26.36   $    22.71    $    9.49
680                                Zone 2 - Suburban           U2F*       $     9.96   $    22.71    $    9.49
681                                Zone 3 - Urban              U2F*       $     7.37   $    22.71    $    9.49
682                                PSD#6   2-Wire Very
                                   High-band Capable
683                                Zone 1 -  Rural             2SLEX      Not              Not           Not
                                                                          applicable       applicable    applicable
684                                Zone 2 - Suburban           2SLEX      Not              Not           Not
                                                                          applicable       applicable    applicable
685                                Zone 3 - Urban              2SLEX      Not              Not           Not
                                                                          applicable       applicable    applicable
686                                PSD#7   2-Wire Capable
                                   Loop - 2-Wire Short Reach
                                   Very High-band Symmetric
                                   Technology
687  01/03/01                      Zone 1 -  Rural             2SLFX      $    17.51   $    21.34    $   10.16      KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
----------------------------------------------------------------------------------------------------------------------------------


                                                                        20 OF 21

<Page>

NN = Not Negotiated                                             Appendix Pricing
                                                              Schedule of Prices
                                                         Effective Date 10/18/00

       SOUTHWESTERN BELL TELEPHONE COMPANY/BIRCH TELECOM OF KANSAS, INC.
                                     KANSAS


----------------------------------------------------------------------------------------------------------------------------------
LINE  CHANGE/      RATE ELEMENT              SERVICE            USOCS     RECURRING  NONRECURRING   NONRECURRING  SUBSEQUENT
      UPDATES                                                              RATE       RATE FIRST    RATE          CHANGES
                                                                                                    ADDITIONAL
----------------------------------------------------------------------------------------------------------------------------------
                                                                                              

688  01/03/01                      Zone 2 - Suburban           2SLFX      $    10.23   $    21.34    $   10.16      KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
689  01/03/01                      Zone 3 - Urban              2SLFX      $     8.90   $    21.34    $   10.16      KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
690                                UNE-P PROMOTION
691                                NETWORK COMPONENT           R2RLP*          NA      $    29.55    $   15.50
692                                ANALOG LINE PORT
693  01/03/01                      Zone 1 -  Rural             RBQ        $     1.97       N/A           N/A        KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
694  01/03/01                      Zone 2 - Suburban           RBQ        $     1.97       N/A           N/A        KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
695  01/03/01                      Zone 3 - Urban              RBQ        $     1.97       N/A           N/A        KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
696                                2-WIRE ANALOG LOOP
697  01/03/01                      Zone 1 -  Rural             RB9        $    23.54   $    28.45    $   13.55      KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
698  01/03/01                      Zone 2 - Suburban           RB9        $    13.77   $    28.45    $   13.55      KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
699  01/03/01                      Zone 3 - Urban              RB9        $    12.71   $    28.45    $   13.55      KS  Dkt 149-GIT
                                                                                                                    and 032-GIT
700                                2-Wire cross-connect from   UDLX2           NN      $    35.83    $   29.44
                                   analog loop to switch port
701                                *These rates are subject to  adjustment as set out in the  Conditions  for FCC Order  Approving
                                   SBC/Ameritech Merger, CC DocketNo. 98-141 (FCC Merger Conditions).
702
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                                                                        21 OF 21