Document:

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                                                                   EXHIBIT 10.30

                       FIRST AMENDMENT TO CREDIT AGREEMENT

         This First Amendment to Credit Agreement (this "First Amendment") is
entered into as of June 30, 2000 by and among PECOS-GOMEZ, L.P., a Texas limited
partnership, formerly known as Humphrey-Hill, L.P. ("Borrower"), BANK OF
AMERICA, N.A., a national banking association, as Administrative Agent
("Administrative Agent") and each of the financial institutions set forth on the
signature pages hereto as Banks.

                                   WITNESSETH:

         WHEREAS, Borrower, Administrative Agent, and Bank of America, N.A., (in
its individual capacity) are parties to that certain Credit Agreement dated as
of March 24, 2000 (the "Credit Agreement") (unless otherwise defined herein, all
terms used herein with their initial letter capitalized shall have the meaning
given such terms in the Credit Agreement); and

         WHEREAS, pursuant to the Credit Agreement, the Banks have made a
Revolving Loan to Borrower and provided certain other credit accommodations to
Borrower; and

         WHEREAS, Taurus intends to transfer its limited partnership interests
in Borrower to EXCO (Delaware), Inc., a Delaware corporation (the "Transfer");
and

         WHEREAS, as a result of such transfer, Taurus will cease to own fifty
percent (50%) of the limited partnership interests in Borrower; and

         WHEREAS, Borrower desires to amend the definition of "Change in
Control" contained in the Credit Agreement to accommodate such transfer; and

         WHEREAS, pursuant to that certain Transfer and Assignment Agreement
dated May 16, 2000, Hill desires to transfer a 4.13742% limited partnership
interest in Borrower to EXCO (Delaware), a .08113% interest in Borrower to
Humphrey Oil, a 1.14387% interest in Borrower to Humphrey Oil Interests, L.P., a
Texas limited partnership, and a .76258% interest in Borrower to The Humphrey
Children's Trust, a trust organized under the laws of the State of Texas
(collectively, the "Transfers"); and

         WHEREAS, the partners of Borrower desire to amend the Amended and
Restated Agreement of Limited partnership of Pecos-Gomez, L.P. (as amended by
Amendment to Amended and Restated Agreement of Limited Partnership of
Humphrey-Hill, L.P., dated April 14, 2000, the "Partnership Agreement");

         WHEREAS, the Banks' consent is required to amend the Partnership
Agreement;

         WHEREAS, Borrower desires the Banks' consent to the Second Amendment to
Amended and Restated Partnership Agreement of Limited Partners of Pecos-Gomez,
L.P., dated May 16, 2000, amending the Partnership Agreement; and

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         WHEREAS, subject to the terms and conditions herein contained, Banks
have agreed to Borrower's requests.

         NOW THEREFORE, for and in consideration of the mutual covenants and
agreements herein contained and other good and valuable consideration, the
receipt and sufficiency of which are hereby acknowledged and confessed,
Borrower, Administrative Agent and Banks hereby agree as follows:

         SECTION 1. Amendments. In reliance on the representations, warranties,
covenants and agreements contained in this First Amendment, the Credit Agreement
is hereby amended in the manner provided in this Section 1.

         1.1 Additional Definitions. Section 1.1 of the Credit Agreement is
amended to add thereto in alphabetical order the definitions of "EXCO
(Delaware)", "EXCO (Delaware) Change of Control", and "First Amendment," which
shall read in full as follows:

             "EXCO (Delaware)" means EXCO (Delaware), Inc., a Delaware
         corporation.

             "EXCO (Delaware) Change of Control" means the occurrence of any
         event or circumstance which, for any reason (including by operation of
         law), results in EXCO ceasing to own on a fully-diluted basis, one
         hundred percent (100%) of the outstanding capital stock of EXCO
         (Delaware) of every class, free and clear of all Liens.

             "First Amendment" means that certain First Amendment dated as of
         June 30, 2000 among Borrower, Administrative Agent and the financial
         institutions a party thereto as Banks.

         1.2 Amendment to Definitions. The definitions of "Borrower," "Change of
Control" and "Loan Papers" set forth in Section 2.1 of the Credit Agreement are
amended to read in full as follows:

             "Borrower" means Pecos-Gomez, L.P., a Texas limited partnership,
         formerly known as Humphrey-Hill, L.P.

             "Change of Control" means the occurrence of (a) any event or
         circumstance which, for any reason (including by operation of law),
         results in any of (i) EXCO (Delaware) ceasing to own on a fully diluted
         basis fifty percent (50%) of the limited partnership interests in
         Borrower free and clear of all Liens (ii) EXCO ceasing to own on a
         fully diluted basis one hundred percent (100%) of the general
         partnership interests in Borrower free and clear of all Liens, (b) an
         EXCO Change of Control, or (c) a EXCO (Delaware) Change of Control.

             "Loan Papers" means the Credit Agreement, the First Amendment, the
         Notes, any Facility Guaranty, each Security Agreement, all Mortgages
         now or at any time hereafter delivered pursuant to Section 6.1, and all
         other certificates, documents or instruments delivered in connection
         with this Agreement, as the foregoing may be amended from time to time.

         1.3 Taurus. As of the date hereof, each reference to Taurus in the
Credit Agreement is hereby deemed a reference to EXCO (Delaware).

                                       2
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         SECTION 2.  Consent to Amendment of Partnership Agreement. The Banks
hereby consent to the Second Amendment to Amended and Restated Partnership
Agreement dated May 16, 2000, amending Borrower's Partnership Agreement for the
purpose of reflecting the Transfers. The consent herein granted is a one-time
consent, and is limited to Section 10.6 of the Credit Agreement solely with
respect to the amendment of Borrower's Partnership Agreement by the Second
Amendment to Amended and Restated partnership Agreement dated May 16, 2000.
Nothing contained herein shall obligate the Banks to grant any consent to the
deviation from any other provision of the Credit Agreement or any other Loan
Paper or to grant any future waiver of Section 10.6 of the Credit Agreement.

         SECTION 3. Representations and Warranties of Borrower. To induce Banks
and Administrative Agent to enter into this First Amendment, Borrower hereby
represents and warrants to Administrative Agent and Banks as follows:

         3.1 Credit Agreement. Each representation and warranty of Borrower
contained in the Credit Agreement and the other Loan Papers is true and correct
on the date thereof.

         3.2 Authorization. The execution, delivery and performance by Borrower
of this First Amendment are within Borrower's corporate powers, have been duly
authorized by all necessary corporate action, require no action by or filing
with, any governmental body, agency or official and do not violate or constitute
a default under any provision of applicable Law or Material Agreement binding
upon Borrower or result in the creation or imposition of any Lien upon any of
the assets of Borrower other than the Liens securing the Obligations.

         3.3 Binding Effect. This First Amendment constitutes the valid and
binding obligation of Borrower enforceable in accordance with its terms, except
as the enforceability thereof may be limited by bankruptcy, insolvency or
similar laws affecting creditors rights generally, and the availability of
equitable remedies may be limited by equitable principles of general
application.

         3.4 No Defenses. Borrower has no defenses to payment, counterclaim or
rights of set-off with respect to the Obligations existing on the date hereof.

         SECTION 4. Miscellaneous.

         4.1 No Default. Banks hereby waive any Default or Event of Default
under the Loan Papers arising out of the Transfer.

         4.2 Reaffirmation of Loan Papers; Extension of Liens. Any and all of
the terms and provisions of the Credit Agreement and the Loan Papers shall,
except as amended and modified hereby, remain in full force and effect. Borrower
hereby extends the Liens securing the Obligations until the Obligations have
been paid in full or are specifically released by Administrative Agent and Banks
prior thereto, and agrees that the amendments and modifications herein contained
shall in no manner adversely affect or impair the Obligations or the Liens
securing payment and performance thereof.

         4.3 Parties in Interest. All of the terms and provisions of this First
Amendment shall bind and inure to the benefit of the parties hereto and their
respective successors and assigns.

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         4.4 Legal Expenses. Borrower hereby agrees to pay on demand all
reasonable fees and expenses of counsel to Administrative Agent incurred by
Administrative Agent, in connection with the preparation, negotiation and
execution of this First Amendment and all related documents.

         4.5 Counterparts. This First Amendment may be executed in counterparts,
and all parties need not execute the same counterpart. Facsimiles shall be
effective as originals.

         4.6 Complete Agreement. THIS FIRST AMENDMENT, THE CREDIT AGREEMENT AND
THE OTHER LOAN PAPERS REPRESENT THE FINAL AGREEMENT AMONG THE PARTIES AND MAY
NOT BE CONTRADICTED BY EVIDENCE OF PRIOR, CONTEMPORANEOUS OR ORAL AGREEMENTS OF
THE PARTIES. THERE ARE NO UNWRITTEN ORAL AGREEMENTS BETWEEN OR AMONG THE
PARTIES.

         4.7 Headings. The headings, captions and arrangements used in this
First Amendment are, unless specified otherwise, for convenience only and shall
not be deemed to limit, amplify or modify the terms of this First Amendment, nor
affect the meaning thereof.

                            [Signature Pages Follow]

                                       4
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         IN WITNESS WHEREOF, the parties hereto have caused this First Amendment
to be duly executed by their respective Authorized Officers effective as of the
date and year first above written.

                                 BORROWER:

                                 PECOS-GOMEZ, L.P., a Texas limited partnership,
                                 formerly known as Humphrey-Hill, L.P.

                                 By: EXCO Resources, Inc., a Texas corporation,
                                     its general partner

                                     By: /s/ Ted W. Eubank
                                         ---------------------------------------
                                             Ted W. Eubank, President

                                 ADMINISTRATIVE AGENT:

                                 BANK OF AMERICA, N.A.

                                 By: /s/ Denise A. Smith
                                     -------------------------------------------
                                         Denise A. Smith,
                                         Managing Director

                                 BANKS:

                                 BANK OF AMERICA, N.A.

                                 By: /s/ Denise A. Smith
                                     -------------------------------------------
                                         Denise A. Smith,
                                         Managing Director

                                       5<PAGE>   1
                                                                    EXHIBIT 10.9

                            ASSIGNMENT OF SECURITIES

         This Assignment of Securities ( this "Assignment") is entered into as
of the 28th day of July 2000, by and between HMTF Bridge RHY, LLC, a Delaware
limited liability company (the "Assignor"), HM4 Rhythms Qualified Fund, LLC, a
Delaware limited liability company, HM4 Rhythms Private Fund, LLC, a Delaware
limited liability company, HM PG-IV Rhythms, LLC, a Delaware limited liability
company, HM 4-SBS Rhythms Coinvestors, LLC, a Delaware limited liability
company, and HM 4-EQ Rhythms Coinvestors, LLC, a Delaware limited liability
company (collectively, the "Assignees").

                                    RECITALS

         A. Assignor is a party to that certain Preferred Stock and Warrant
Purchase Agreement, dated February 6, 2000 (the "Purchase Agreement"), by and
between Rhythms Netconnections, Inc., Inc., a Delaware corporation (the
"Company"), and each of the Purchasers listed on Schedule I thereto. Capitalized
terms not otherwise defined herein shall have the meaning ascribed to such terms
in the Purchase Agreement.

         B. Assignor desires to assign and delegate to Assignees all of
Assignor's rights, titles, and interests in and to the Purchase Agreement.

                                   AGREEMENTS

         NOW, THEREFORE, in consideration of the covenants of Assignees
hereunder and for other good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, the parties hereto, intending to
be legally bound, hereby agree as follows:

         1. ASSIGNMENT. Pursuant to Section 8.12 of the Purchase Agreement,
Assignor hereby sells, assigns, transfers, and conveys to each Assignee and its
respective successors and assigns the percentage of Assignor's rights, titles,
interests, and obligations in, to, and under the Purchase Agreement as set forth
opposite such Assignee's name on Exhibit A (including, without limitation, the
right to amend, terminate, supplement, and extend the Purchase Agreement,
collectively the "Contract Rights").

         2. ASSUMPTION. Each Assignee hereby agrees to assume and perform timely
all Contract Rights of the Assignor hereby sold, assigned, transferred, and
conveyed to such Assignee and agrees to be bound by the terms of the Purchase
Agreement and the other Equity Documents to which Assignor was to become a
party. Except as expressly set forth in this Assignment, Assignees do not hereby
assume or agree to pay any other liabilities or obligations of Assignor of any
nature.

         3. TITLE TO CONTRACT RIGHTS. Assignor hereby binds itself, its
successors, and its assigns to warrant and defend forever, all and singular,
title to the Contract Rights unto Assignees and their respective successors and
assigns against every person lawfully claiming or to claim the same or any

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part thereof. Assignor warrants to each Assignee that it is conveying good title
to the Contract Rights free and clear of all Liens.

         4. POWER OF ATTORNEY. Assignor hereby constitutes and appoints each
Assignee as Assignor's true and lawful attorney, with full power of
substitution, for it and in its name, place, and stead, but on behalf of and for
the benefit of such Assignee, (a) to demand and receive from time to time any
and all Contract Rights and to get receipts and releases for and in respect of
the same or any part thereof, and (b) to do generally all and any such acts and
things in relation thereto as such Assignee shall deem advisable.

         5. FURTHER ASSURANCES. Assignor, for itself and its successors and
assigns, hereby covenants and agrees with Assignees that Assignor will do,
execute, acknowledge, and deliver, or will cause to be done, executed,
acknowledged, and delivered, all such further acts, conveyances, transfers,
assignments, powers of attorney, and assurances as may be required to assure,
convey, transfer, confirm, and vest unto Assignees any and all of the Contract
Rights and to aid and assist Assignees in collecting and reducing the same to
possession.

         6. GOVERNING LAW. This Assignment shall be governed by and construed in
accordance with the laws of the State of New York.

               [The remainder of this page is intentionally blank]

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         IN WITNESS WHEREOF, the undersigned have caused this Agreement to be
signed, all as of the date first written above.

                                            ASSIGNOR:

                                            HMTF BRIDGE RHY, LLC

                                            By: /s/ David W. Knickel
                                               -------------------------------
                                            Name: David W. Knickel
                                                 -----------------------------
                                            Title: Vice President
                                                  ----------------------------

                                            ASSIGNEES:

                                            HM 4-EQ RHYTHMS COINVESTORS, LLC

                                            By: /s/ David W. Knickel
                                               -------------------------------
                                            Name: David W. Knickel
                                                 -----------------------------
                                            Title: Vice President
                                                  ----------------------------

                                            HM 4-SBS RHYTHMS COINVESTORS, LLC

                                            By: /s/ David W. Knickel
                                               -------------------------------
                                            Name: David W. Knickel
                                                 -----------------------------
                                            Title: Vice President
                                                  ----------------------------

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                                            HM PG-IV RHYTHMS, LLC

                                            By: /s/ David W. Knickel
                                               -------------------------------
                                            Name: David W. Knickel
                                                 -----------------------------
                                            Title: Vice President
                                                  ----------------------------

                                            HM4 RHYTHMS QUALIFIED FUND, LLC

                                            By: /s/ David W. Knickel
                                               -------------------------------
                                            Name: David W. Knickel
                                                 -----------------------------
                                            Title: Vice President
                                                  ----------------------------

                                            HM4 RHYTHMS PRIVATE FUND, LLC

                                            By: /s/ David W. Knickel
                                               -------------------------------
                                            Name: David W. Knickel
                                                 -----------------------------
                                            Title: Vice President
                                                  ----------------------------

<PAGE>   5

                                    EXHIBIT A

                            ASSIGNMENT OF SECURITIES

<TABLE>
<CAPTION>
                                                            SHARES OF
                                                            SERIES E       NUMBER OF    NUMBER OF      NUMBER OF
                                                            PREFERRED       3-YEAR       5-YEAR         7-YEAR
                                                              STOCK        WARRANTS     WARRANTS       WARRANTS
                                        PERCENTAGE            TO BE         TO BE        TO BE          TO BE
             ASSIGNEE                   TRANSFERRED         ACQUIRED       ACQUIRED     ACQUIRED       ACQUIRED
             --------                   -----------         --------       --------     --------       --------

<S>                                      <C>                 <C>           <C>           <C>           <C>
HM4 Rhythms Qualified Fund, LLC          90.994792%          113,743       853,076       853,076       853,076
HM4 Rhythms Private Fund, LLC             0.644644%              806         6,044         6,044         6,044
HM PG-IV Rhythms, LLC                     4.844421%            6,056        45,416        45,416        45,416
HM 4-SBS Rhythms Coinvestors, LLC         2.179044%            2,724        20,429        20,429        20,429
HM 4-EQ Rhythms Coinvestors, LLC          1.337099%            1,671        12,535        12,535        12,535
Total                                     100.0000%          125,000       937,500       937,500       937,500
</TABLE>

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