Document:

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                                                                    EXHIBIT 10.4

                                 FIRST AMENDMENT
                                       TO
                              TERMINATION AGREEMENT

         This FIRST AMENDMENT TO TERMINATION AGREEMENT (this "Amendment") is
made this 9th of April, 2001, by and among Antec Corporation, a Delaware
corporation ("Antec"), Nortel Networks Inc., a Delaware corporation ("Nortel
Networks"), Nortel Networks LLC, a Delaware limited liability company ("Nortel
Networks LLC"), Nortel Networks Limited, a Canadian corporation ("Nortel
Networks Ltd."), Broadband Parent Corporation, a Delaware corporation
("Broadband Parent Corporation"), and Arris Interactive L.L.C., a Delaware
limited liability company ("Existing Venture"), to amend the Termination
Agreement, dated October 18, 2000, by and among the same parties (the "Original
Agreement" and, as amended hereby, the "Agreement") .

         All capitalized terms used but not defined herein shall have the
meaning ascribed to such terms in the Original Agreement.

         WHEREAS, the parties hereto desire to amend Section 2 of the Original
Agreement;

         NOW, THEREFORE, for good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, the parties hereto agree as
follows:

         1.       Amendment and Restatement of Section 2 of the Original
Agreement. Section 2 of the Original Agreement is hereby amended by deleting the
same in its entirety and inserting in lieu thereof the following:

         "2.      Notwithstanding the foregoing, in the event that the
Terminated Agreements do not earlier terminate pursuant to Section 1 of this
Agreement, the following shall occur effective April 9, 2001:

                  (a)      the Second Framework Agreement shall be amended by
deleting Article IV thereof in its entirety;

                  (b)     the First Framework Agreement shall be amended by
deleting Article IV thereof in its entirety;

                  (c)      the First Distributor Agreement shall be amended by
deleting Section 7(i) thereof in its entirety;

                  (d)      the Second Distributor Agreement shall be amended by
deleting Section 7(h) thereof in its entirety;

                  (e)      the International Distributor Agreement shall be
amended by deleting Section 7(i) thereof in its entirety; and

<PAGE>   2

                  (f)      the Antec Distributor Agreement shall be amended by
deleting Section 7(j) thereof in its entirety."

         2.       Except for the amendments expressly set forth above, the
Original Agreement shall remain unchanged and in full force and effect.

         3.       The provisions of Sections 3, 4 and 5 of the Original
Agreement shall apply to this Amendment as if set forth herein in their
entirety.

                  [Remainder of page intentionally left blank]

                                       2
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         IN WITNESS WHEREOF, the parties hereto have caused this First Amendment
to Termination Agreement to be executed on the day and year first above written.

                                       ANTEC CORPORATION

                                       By: /s/ Lawrence A. Margolis
                                           -----------------------------
                                           Name:  Lawrence A. Margolis
                                           Title: Executive Vice President and
                                                  Chief Financial Officer

                                       NORTEL NETWORKS INC.

                                       By: /s/ Craig A. Johnson
                                           -----------------------------
                                           Name:  Craig A. Johnson
                                           Title:

                                       NORTEL NETWORKS LIMITED

                                       By: /s/ Blair F. Morrison
                                           -----------------------------
                                           Name:  Blair F. Morrison
                                           Title: Assistant Secretary

                                       By: /s/ William R. Kerr
                                           -----------------------------
                                           Name:  William R. Kerr
                                           Title: Senior Vice President,
                                                  Corporate Business
                                                  Development

                                       NORTEL NETWORKS LLC

                                       By: /s/ Craig A. Johnson
                                           -----------------------------
                                           Name:  Craig A. Johnson
                                           Title:

                                       BROADBAND PARENT CORPORATION

                                       By: /s/ Lawrence A. Margolis
                                           -----------------------------
                                           Name:  Lawrence A. Margolis
                                           Title: Vice President and
                                                  Secretary

                                       ARRIS INTERACTIVE L.L.C.

                                       By: /s/ David B. Potts
                                           -----------------------------
                                           Name:  David B. Potts
                                           Title: Vice President and Chief
                                                  Financial Officer

                                       3<PAGE>   1

                  AMENDMENT NO. 5 ("Amendment"), dated as of April __, 2001, to
the Amended and Restated Credit Agreement, dated as of March 10, 2000 (as the
same may be amended, restated, supplemented and/or modified from time to time in
accordance with its terms, the "Credit Agreement"), by and between VIASOURCE
COMMUNICATIONS, INC. (the "Borrower") and GENERAL ELECTRIC CAPITAL CORPORATION
(the "Lender"). All capitalized terms used herein and not otherwise defined
shall have the meanings assigned to such terms in the Credit Agreement.

                  The Borrower has requested that Lender amend certain margins,
amend certain financial covenants and waive compliance with certain financial
covenants and Lender is willing to grant such requests on the terms and
conditions set forth herein.

                  Accordingly, the parties hereto agree as follows:

                  Section 1.        Amendment

                  (a)      Section 2.2(a) of the Credit Agreement is hereby
amended by (x) deleting the tables for calculation of "Applicable Margin" for
Term Loans and Revolving Loans and (y) inserting the following substitution
therefor:

                           The "APPLICABLE MARGIN" for Loans that are Base Rate
         Loans and LIBOR Rate Loans shall be determined quarterly, based upon
         the calculation of the Total Leverage Ratio for the prior fiscal
         quarter, as follows:

<TABLE>
<CAPTION>
RATIOS                          APPLICABLE MARGIN FOR     APPLICABLE MARGIN FOR BASE
------                          ---------------------     --------------------------
                                  LIBOR RATE LOANS                RATE LOANS
                                  ----------------                ----------

<S>                             <C>                       <C>
Total Leverage less than                 3.25%                       2.00%
4.25x

Total Leverage greater than              4.00%                       2.75%
or equal to 4.25x but less
than 5.25x

Total Leverage greater than              4.50%                       3.25%
or equal to 5.25x but less
than 6.25x

Total Leverage greater than              5.00%                       3.75%
or equal to 6.25x
</TABLE>

                  (b)      Section 2.4(e) is hereby amended by amending and
restating the table appearing therein in its entirety as follows:

<PAGE>   2

<TABLE>
<CAPTION>
               Payment Date                          Installment Amount
               ------------                          ------------------
       <S>                                           <C>
       December 31, 2000, March 31, 2001,
       June 25, 2001 and September 25, 2001            $  468,750.00

       December 26, 2001, March 26, 2002,
       June 25, 2002, September 25, 2002,              $  937,500.00
       December 26, 2002, March 26, 2003,
       June 25, 2003 and September 25, 2003

       December 26, 2003, March 26, 2004,              $1,406,250.00
       June 25, 2004 and September 7, 2004
</TABLE>

                  (b)      Section 6.4(iii) of the Credit Agreement is hereby
amended and restated in its entirety as follows:

                           (iii)    Borrower and its Subsidiaries may make
                           Consolidated Capital Expenditures for the Fiscal Year
                           ended December 31, 2001 in an aggregate amount not to
                           exceed $10,000,000 and thereafter Borrower and its
                           Subsidiaries may make Consolidated Capital
                           Expenditures in any Fiscal Quarter in an aggregate
                           amount not to exceed $3,500,000; provided, however,
                           that such amount of Consolidated Capital Expenditures
                           may be increased in an amount equal to the net
                           proceeds of any equity raise by the Borrower
                           occurring during the Fiscal Year ended December 31,
                           2001.

                  (c)      Section 6.7(a) of the Credit Agreement is hereby
amended by amending and restating the table appearing therein in its entirety as
follows:

<TABLE>
<CAPTION>
               Period                                            Ratio
               ------                                            -----

               <S>                                              <C>
               January 1, 2001 through March 31, 2001           5.25:1.0

               March 31, 2001 through June 30, 2001             8.75:1.0

               July 1, 2001 through September 30, 2001          7.25:1.0

               October 1, 2001 through December 31, 2001        5.50:1.0

               January 1, 2002 through June 30, 2002            5.25:1.0

               July 1, 2002 through December 31, 2002           4.50:1.0

               January 1, 2003 and thereafter                   3.0:1.0
</TABLE>

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<PAGE>   3

                  (d)      Section 6.7(c) of the Credit Agreement is hereby
amended by amending and restating the table appearing therein in its entirety as
follows:

<TABLE>
<CAPTION>
               Period                                           Ratio
               ------                                           -----

               <S>                                             <C>
               January 1, 2001 through March 31, 2001          3.50:1.0

               March 31, 2001 through June 30, 2001            5.75:1.0

               July 1, 2001 through September 30, 2001         4.75:1.0

               October 1, 2001 through December 31, 2001       3.25:1.0

               January 1, 2002 through June 30, 2002           3.00:1.0

               July 1, 2002 through December 31, 2002          2.50:1.0

               January 1, 2003 and thereafter                  2.0:1.0
</TABLE>

                  (e)      Section 6.7(d) of the Credit Agreement is hereby
amended and restated in its entirety as follows:

                           (d)      DEBT SERVICE COVERAGE RATIO. The Debt
         Service Coverage Ratio for each day of the rolling four quarter period
         ending as of each day during each period listed below shall not be less
         than the ratio indicated below:

<TABLE>
<CAPTION>
                  Period                                            Ratio
                  ------                                            -----

                  <S>                                              <C>
                  March 31, 2001 through June 30, 2001             1.15:1.0

                  July 1, 2001 through September 30, 2001          1.25:1.0

                  October 1, 2001 through December 31, 2001        1.50:1.0

                  January 1, 2002 and thereafter                   1.75:1.0
</TABLE>

                  Section 2.        Waiver. The Lender hereby waives compliance
by the Borrower with the provisions of Section 6.7(b) of the Credit Agreement
but solely for those Fiscal Quarters occurring during the Fiscal Year ending
December 31, 2001.

                  Section 3.        Representations and Additional Provisions

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<PAGE>   4

                  1.       The Borrower represents and warrants that (i) after
giving effect to this Amendment, no Default or Event of Default is continuing,
(ii) the Borrower has taken all necessary action to authorize the execution,
delivery and performance of this Amendment and (iii) the Credit Agreement, as
amended by this Amendment, is duly enforceable against the Borrower.

                  2.       Except as expressly set forth in this Amendment, the
terms, provisions and conditions of the Credit Agreement and other Loan
Documents are unchanged, and such agreements shall remain in full force and
effect and are hereby confirmed and ratified.

                  3.       The Borrower shall pay all out-of-pocket expenses
incurred by the Lender in connection with the transactions contemplated hereby
under this Amendment, including but not limited to fees and expenses of Kaye,
Scholer, Fierman, Hays & Handler LLP, counsel to the Lender.

                  4.       The term "Agreement", "hereof", "herein" and similar
terms as used in the Credit Agreement, and references in the Loan Documents to
the Credit Agreement shall mean and refer to, from and after the effectiveness
of this Amendment, the Credit Agreement as amended by this Amendment. Except as
herein specifically agreed, the Credit Agreement and the Loan Documents are
hereby ratified and confirmed and shall remain in full force and effect
according to their respective terms.

                  5.       This Amendment shall be effective upon (i) receipt by
the Lender of five fully executed copies hereof, (ii) receipt by the Lender of
an executed Amended and Restated Revolving Note, substantially in the form of
Exhibit A attached hereto and (iii) payment by Borrower to Lender of the closing
fee in the amount of $150,000.

                  6.       This Amendment may be executed in any number of
counterparts, and all such counterparts taken together shall constitute one and
the same instrument. Signature pages may be detached from counterpart documents
and reassembled to form duplicate executed originals. Delivery of an executed
counterpart of a signature page to this Amendment by telecopier shall be
effective as delivery of a manually executed signature page hereto.

                  7.       THIS AMENDMENT AND THE RIGHTS AND OBLIGATIONS OF THE
PARTIES HEREUNDER SHALL, IN ACCORDANCE WITH SECTION 5-1401 OF THE GENERAL
OBLIGATIONS LAW OF THE STATE OF NEW YORK, BE GOVERNED BY THE LAWS OF THE STATE
OF NEW YORK, WITHOUT REGARD TO ANY CONFLICTS OF LAWS PRINCIPLES THEREOF THAT
WOULD CALL FOR THE APPLICATION OF THE LAWS OF ANY OTHER JURISDICTION.

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                  IN WITNESS WHEREOF, the parties hereto have caused this
Amendment to be duly executed by their respective authorized officers as of the
day and year first above written.

                                    VIASOURCE COMMUNICATIONS, INC.

                                    By: /s/ Douglas J. Betlach
                                        ----------------------------------------

                                    GENERAL ELECTRIC CAPITAL
                                    CORPORATION

                                    By: /s/ Thomas P. Waters
                                        ----------------------------------------

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