Document:

<PAGE>

                                                                    EXHIBIT 10.1
                                                                    ------------

                                 Amendment No. 1

                                       to

                              Procurement Agreement

This Amendment ("Amendment") is made and entered into effective this 22nd day of
April, 2002, by and between Qwest Communications Corporation ("Qwest") and
Corvis Operations, Inc. ("Corvis").

                                  -WITNESSETH-

WHEREAS, Qwest and Corvis are parties to that certain Procurement Agreement
dated June 5, 2000 (the "Agreement"); and

WHEREAS, Qwest and Corvis desire to amend the Agreement.

NOW, THEREFORE in consideration of the foregoing premises and mutual promises
and covenants of the Parties hereto, the receipt and sufficiency of which is
hereby acknowledged, Qwest and Corvis agree to amend the Agreement as follows:

1.    Unless specifically indicated otherwise, all capitalized terms used herein
shall have the same meaning given to them in the Agreement. Notwithstanding the
foregoing, all references to "Minimum Deployment Commitment" in the Agreement
shall be changed to read "Purchase Commitment" and all references to the
"Initial Deployment Commitment" shall be deleted.

2.    Sections 1.1 - 1.4 are deleted in their entirety, and the following
inserted in substitution thereof:

1.1   Purchase Commitment. Qwest will purchase and accept from Corvis, subject
to acceptance criteria, Equipment, Software and/or Services in quantities and in
configurations priced at twelve million dollars US ($12,000,000) (the "Purchase
Commitment"), seven million dollars US ($7,000,000) of which (the "Initial
Purchase Commitment") must be purchased on or before December 29, 2002, and the
balance of which, totalling five million dollars US ($5,000,000), must be
purchased on or before December 29, 2003, in each case based on the prices and
license fees set forth in the Price List attached hereto as Attachment 3.1 or in
a Corvis sales quote. For purposes of the preceding sentence, Qwest will be
deemed to have purchased a Product if Qwest has ordered the Product for delivery
and acceptance before the end of the applicable period (i.e., [*] or [*]). The
provisions of Section 1.11 of the Agreement shall not apply to the Purchase
Commitment.

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1.2   Qwest Future Purchases. Qwest, in its sole discretion, may purchase
additional Corvis Equipment, Software and/or Services in quantities and
configurations at prices totalling up to one hundred thirty eight million
dollars US ($138,000,000) Corvis will offer such Equipment and Software during
the Initial Term based on the pricing set forth in the Price List attached
hereto as Attachment 3.1, or in a Corvis sales quote. Because of the rapid pace
of change in technology in the area of telecommunications equipment and the
uncertainty as to the exact nature of Qwest's future system needs, it is agreed
that, notwithstanding any other provision of this Agreement, including, among
others, this Section 1.2, Qwest shall have no binding obligation to purchase
Corvis Equipment, Software and Services beyond those amounts specified in
Section 1.1 above, and Qwest shall have no liability to Corvis with respect to,
or arising from, Qwest's failure, for any reason, to make any purchases under
this Agreement beyond those set forth in Section 1.1 above, provided, however,
that Purchase Orders shall constitute binding commitments in accordance with the
terms of this Agreement.

1.3   Incomplete Purchases Per Purchase Commitment. If Qwest fails to purchase,
as provided in Section 1.1, a total dollar value of Corvis Equipment, Software
and/or Services equal to or exceeding the Purchase Commitment within each
relevant time period, Corvis may then invoice Qwest for an amount equal to the
purchase price and license fees for such Corvis Equipment, Software and/or
Services that Qwest failed to purchase pursuant to Section 1.1 for such time
period (the "Purchase Shortfall") and Qwest shall pay such invoice within [*]
days after receipt. If Qwest issues Purchase Orders for at least the amount of
the Purchase Shortfall within such [*]-day payment period for delivery of
Equipment, Software and/or Services within [*] months of such Purchase Orders,
Qwest will receive a credit towards the Purchase Commitment for the full amount
of the payment made for the Purchase Shortfall.

1.4 [RESERVED]

3.    Section 1.7 is deleted in its entirety, and the following inserted in
substitution thereof:

1.7   Alteration of Delivery Dates. Qwest will have the right to alter the
destination site at least ten (10) days prior to Corvis' scheduled shipment date
for Products, without cost or expense to Qwest, by timely transmitting notice to
Corvis of the new Specified Site(s). In addition, Qwest may, by written notice
to Corvis, unilaterally modify the content of any Purchase Order issued
hereunder, so long as (i) such modification is received at least 12 weeks prior
to the agreed delivery date of the affected Products, and (ii) the total dollar
value of the Purchase Order is not reduced.

4.    New Sections 1.14 - 1.21 are inserted, as follows:

1.14  Release 1 Field Trial.

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(a) On or before [*], the Parties shall mutually agree in good faith upon: (i) a
list of Equipment and Software (the " R1 Field Trial System"), (ii) equipment
pricing, (iii) a test plan, including lab certification requirements, (iv)
tests, (v) expected test results, and (vi) roles and responsibilities (the "R1
Field Trial Test Plan") for Qwest to accomplish a field trial, as defined below,
of the Corvis R 1 Field Trial System, using a budget not to exceed the Initial
Purchase Commitment, unless otherwise agreed in writing. Corvis shall deliver to
Qwest the R1 Field Trial System on or before [*] (the "R1 Delivery Date"). All
equipment shall be NEBS 1 certified by NTRL according to the requirements set
forth on Attachment 1.14 hereto. The R1 Field Trial System, and any Equipment to
be loaned by Corvis to Qwest for the R1 Field Trial, shall be identified in
Attachment 1.14 to the R1 Field Trial Test Plan. Qwest may use the R1 Field
Trial System in accordance with the license specified in Section 1.18(a).

(b) On or before [*], Corvis shall commence installation and turn up, at Corvis'
expense, the R1 Field Trial System, and the R1 Field Trial, as defined below,
shall also commence. The field trial will use current field or next generation
fiber, at Qwest's option, and shall test the R1 Field Trial System in a test
route or test configuration to be specified by Qwest (the "R1 Field Trial"). The
R1 Field Trial shall be conducted in accordance with terms of this Section 1.14,
Sections 1.16-1.20, and the R1 Field Trial Test Plan which, when executed by the
Parties, shall be incorporated herein by reference. Should there be any conflict
between the terms of the R1 Field Trial Test Plan and the Agreement as amended,
the Agreement shall control.

(c) The Parties shall use commercially reasonable efforts to conduct and
complete the R1 Field Trial no later than [*]; provided, however, that Qwest's
obligation to conduct the lab or R1 Field Trial shall not extend beyond [*]
after the commencement of the R1 Field Trial, unless (i) such extension is
necessitated by Qwest's failure to devote adequate resources to execution of the
R1 Field Trial Test Plan, or (ii) an extension is agreed to in writing by the
Parties. Should the R1 Field Trial System fail to meet any test criterion
specified in the R1 Field Trial Test Plan, Qwest shall promptly notify Corvis of
any such failure and Corvis shall diligently work to correct such failure. The
R1 Field Trial shall be deemed successfully completed when the R1 Field Trial
System passes the R1 Field Trial Test Plan, and Qwest shall certify such
success, in writing, to Corvis within five (5) days thereafter. If the R1 Field
Trial is not successfully completed, Qwest will ship the R1 Field Trial System
to Corvis at Corvis' expense.

(d) Upon successful completion of the R1 Field Trial and the R1 Field Trial
System's passage of the R1 Field Trial Test Plan, Qwest shall purchase the R-1
Field Trial System (other than any loaner equipment) at the prices specified in
the R-1 Field Trial Agreement, and payment shall be made thirty (30) days after
receipt of invoice. Purchase of the R-1 Field Trial System shall be counted
toward the Purchase Commitment.

(e) Subject to the last sentence of this Section 1.14(e), upon payment of the
purchase price for any portion of the R1 Field Trial System by Qwest, that
portion of the R1 Field Trial System will be deemed covered by the terms and
conditions of the Agreement to the same extent as if that portion of the R1
Field Trial System had been procured by Qwest pursuant to the Agreement, and the
terms and conditions of this Section 1.14, and Sections 1.16 through 1.20 shall
no longer apply to that portion of the R1 Field Trial System. Prior to the
payment of the

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purchase price for the portion of the R1 Field Trial System, the terms and
conditions of this Section 1.14, and 1.16 through 1.20, will apply to the R1
Field Trial System. Any software right to use ("RTU") as specified in the Price
List (attached  hereto as Attachment 3.1) associated with the R1 Field Trial
System shall become due and payable if and when Qwest uses any component of the
R1 Field Trial System to carry commercial traffic.

1.15     Release 4 Field Trial.

(a) On or before [*] the Parties shall mutually agree in good faith upon: (i) a
list of Equipment and Software (the " R4 Field Trial System"), (ii) equipment
pricing, (iii) a test plan, including lab certification requirements, (iv)
tests, (v) expected test results, and (vi) roles and responsibilities (the "R4
Field Trial Test Plan") for Qwest to accomplish a field trial, as defined below,
of the Corvis R4 Field Trial System, using a budget not to exceed the Purchase
Commitment, unless otherwise agreed in writing. Corvis shall deliver to Qwest
the R4 Field Trial System on or before [*] (the "R4 Delivery Date"). All
equipment shall be NEBS 1 certified by NTRL according to the requirements set
forth in Attachment 1.14 to this Amendment. The R4 Field Trial System, and any
Field Trial System to be loaned by Corvis to Qwest, shall be identified in
Attachment 1.14 to the R4 Field Trial Test Plan. Qwest may use the Field Trial
System in accordance with the license specified in Section 1.18(a).

(b) On or before [*], Corvis shall commence installation and turn up, at Corvis'
expense, the R4 Field Trial System, and the R4 Field Trial, as defined below,
shall also commence. The field trial will use current field or next generation
fiber, at Qwest's option, and shall test the R4 Field Trial System in a test
route or test configuration to be specified by Qwest (the "R4 Field Trial"). The
R4 Field Trial shall be conducted in accordance with terms of this Section 1.15,
1.16 through 1.20, and the R4 Field Trial Test Plan which, when executed by the
Parties, shall be incorporated herein by reference. Should there be any conflict
between the terms of the R4 Field Trial Test Plan and the Agreement, as amended,
the Agreement shall control.

(c) The Parties shall use commercially reasonable efforts to conduct and
complete the R4 Field Trial no later than [*]; provided, however, that Qwest's
obligation to conduct the lab or R4 Field Trial shall not extend beyond [*] days
after the commencement of the R4 Field Trial, unless (i) such extension is
necessitated by Qwest's failure to devote adequate resources to execution of the
R4 Field Trial Test Plan, or (ii) an extension is agreed to in writing by the
Parties. Should the R4 Field Trial System fail to meet any test criterion
specified in the R4 Field Trial Test Plan, Qwest shall promptly notify Corvis of
any such failure and Corvis shall diligently work to correct such failure. The
R4 Field Trial shall be deemed successfully completed when the R4 Field Trial
System passes the R4 Field Trial Test Plan, and Qwest shall certify such
success, in writing, to Corvis within five (5) days thereafter. If the R4 Field
Trial is not successfully completed, Qwest will ship the R4 Field Trial System
to Corvis at Corvis' expense.

(d) Upon successful completion of the R4 Field Trial and the R4 Field Trial
System's passage of the R4 Field Trial Test Plan, Qwest shall purchase the R4
Field Trial System (other

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<PAGE>

than any loaner equipment) at the prices specified in the R4 Field Trial
Agreement, and payment shall be made thirty (30) days after receipt of invoice.
Purchase of the R4 Field Trial System shall be counted toward the Purchase
Commitment.

(e)  Subject to the last sentence of this Section 1.15(e), upon payment of the
purchase price for any portion of the R4 Field Trial System by Qwest, that
portion of the R4 Field Trial System will be deemed covered by the terms and
conditions of the Agreement to the same extent as if that portion of the R4
Field Trial System had been procured by Qwest pursuant to the Agreement, and the
terms and conditions of this Section 1.15 and Sections 1.16 through 1.20 shall
no longer apply to that portion of the R4 Field Trial System. Prior to the
payment of the Purchase Price for the R4 Field Trial System, the terms and
conditions of Sections 1.15 through 1.20 will apply to the R4 Field Trial
System. Any software right to use ("RTU") as specified in the Price List
(attached hereto as Attachment 3.1) associated with the R4 Field Trial System
shall become due and payable if and when Qwest uses any component of the R4
Field Trial System to carry commercial traffic.

1.16 Field Trial System Delivery Dates.

(a)  Should Corvis fail to deliver the equipment on the R1 Delivery Date, then
Corvis shall have [*] days thereafter to so deliver the equipment (the "R1
Delivery Extension Period").

(b)  Should Corvis fail to deliver the equipment on the R4 Delivery Date, then
Corvis shall have [*] days thereafter to so deliver the equipment (the "R4
Delivery Extension Period").

(c)  If Corvis delivers the equipment during the R1 Delivery Extension Period or
the R4 Delivery Extension Period, then the commencement date for the
corresponding field trial, and the subsequent dates contemplated for that
particular release's field trial, will be pushed back by the number of
additional days after the applicable delivery date the equipment was actually
delivered. If Corvis fails to deliver the equipment during the R1 Delivery
Extension Period or the R4 Delivery Extension Period, then, unless otherwise
agreed in writing by the Parties, Qwest shall have no obligation to proceed with
the corresponding field trial.

1.17 Reporting Obligations. Qwest shall provide oral feedback and evaluation
data to Corvis that describes Qwest's experience with the Corvis Products. As to
written feedback and evaluation, at a minimum, Qwest shall provide summary test
data generated by the R1 and R4 Field Trials. Qwest agrees that it will notify
Corvis of any errors in the Corvis Products within a reasonable time after such
discovery. Qwest agrees to (i) meet with Corvis, upon Corvis' reasonable request
to document such errors if any, and (ii) to discuss the performance of the
Corvis Products and suggest ideas for improving Corvis' performance either in
person or by telephone. Any such meeting will be at a location and time mutually
agreed upon by Corvis and Qwest.

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1.18 Field Trial License.

(a)  Notwithstanding Sections 9.1 and 9.4 of the Agreement, subject to the terms
and conditions of this Agreement, Corvis grants to Qwest a non-exclusive and
non-transferable license (the "Field Trial License") to use the applicable Field
Trial System and associated Software at the sites of the applicable Field Trial
in object code form only solely for the purpose of internal evaluation of the
Products with Qwest's equipment. Use of the Field Trial System and associated
Software is restricted to the applicable Field Trial System. Use of the
applicable Field Trial System is limited to the Software in the Field Trial
System and as otherwise expressly provided for herein. Qwest may not relocate
the applicable Field Trial System or knowingly give any third party, except as
expressly allowed by this Agreement, access to the applicable Field Trial
System, without Corvis' prior written consent. With respect to any third party
software included with the applicable Field Trial System, Qwest will abide by
the applicable terms and conditions for such third party software. Corvis may
revoke the Field Trial License if Qwest breaches this license, or if the Field
Trial is not successfully completed.

1.19 Warranty. PRIOR TO QWEST'S FULL PAYMENT OF THE PURCHASE PRICE FOR THE R1
FIELD TRIAL SYSTEM AND THE R4 FIELD TRIAL SYSTEM, AND NOTWITHSTANDING SECTIONS
13.1, 13.2, AND 13.5-13.8 HEREOF: (i) SAID EQUIPMENT IS PROVIDED "AS-IS", AND
(ii) CORVIS MAKES NO WARRANTIES WHATSOEVER, EXPRESS OR IMPLIED, WITH RESPECT TO
ANY OF THE PRODUCTS OR SERVICES PROVIDED IN CONNECTION WITH THE R1 FIELD TRIAL
AND THE R4 FIELD TRIAL, INCLUDING BUT NOT LIMITED TO WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

1.20 Risk of Loss. Notwithstanding Section 1.6 hereof, Qwest shall bear the risk
of loss, theft, destruction of or damage to the R1 Field Trial System or R4
Field Trial System up to a value of [*], beginning from Qwest's receipt of the
Equipment at Qwest's location until such Equipment is placed with a carrier for
shipping to Corvis, at Corvis' expense, pursuant to the provisions of the
Agreement, including, without limitation, while such Equipment is in Qwest's
possession or under its control, except to the extent such loss, theft,
destruction or damage is caused by Corvis, its employees, contractors and/or
agents.

1.21 Testing of OC-192 Product. Within [*] days from execution of this
Amendment, Corvis shall provide at no cost to Qwest, and Qwest shall accept
delivery from Corvis of the Corvis OC-192 Product for completion of Qwest's lab
certification process by Qwest; provided, however, that subject to Qwest's using
reasonably diligent efforts to perform certification tests thereon, if the
OC-192 Product has not achieved certification after [*] days of additional
testing by Qwest, Qwest shall have no further obligation to test or certify such
cards.

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<PAGE>

6.  A new Attachment 3.1 ("Price List") is inserted as Attachment 3.1 hereto,
incorporated herein by reference. This Price List shall supersede and replace
any prior Price List.

7.  A new Section 3.3(f) is inserted:

(f) PMSI. Until such time as Corvis is fully paid for Product shipped, as
collateral security for the prompt and complete payment and performance of all
obligations due hereunder, Qwest hereby pledges and assigns to Corvis, and
grants to Corvis a purchase money security interest in, the Products. Qwest will
assist Corvis in taking reasonable actions necessary to perfect and protect
Corvis' security interest, including execution of a reasonable and standard
purchase money security agreement. Once Corvis has received full payment for any
Products, or Qwest has returned to Corvis any loaner Products or Products that
Qwest may return pursuant to the terms of this Agreement, then Corvis shall make
appropriate filings to release such security interests in said Products.

8.  Section 4.1 is deleted in its entirety and the following inserted in
substitution thereof:

4.1 Term. The "Commencement Date" shall mean April 22, 2002. Subject to the
terms and conditions of this Agreement, the initial term of this Agreement will
be from the Effective Date of June 5, 2000 and continue thereafter until
December 31, 2005 ("Initial Term"). This Agreement will be automatically renewed
for successive one-year terms unless either Party gives notice of non-renewal at
least 90 days before the expiration of the Initial Term or any renewal term;
provided, however, that the Purchase Commitment shall not be renewed. The
Initial Term in combination with any extensions is also referred to in this
Agreement as the "Term".

9.  Article 22 Notices, the "copy to" address for Qwest shall be changed to read
as follows:

    Qwest Communications
    General Counsel
    52nd Floor
    1801 California Street
    Denver Colorado 80202

10. The following language is inserted at the end of Section 23.7:

Upon execution of this Amendment No. 1, Corvis may issue a press release
regarding the completion of this Amendment No. 1, subject to the written
approval of Qwest regarding the content of said press release, which approval
shall not be unreasonably withheld.

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<PAGE>

11.  Each Party represents and warrants that this Amendment and any attachments
thereto will constitute, when executed in full, the legal, valid and binding
obligations of said Party, enforceable in accordance with their respective
terms, subject to applicable bankruptcy, insolvency, reorganization, fraudulent
transfer, moratorium or similar laws affecting the enforcement of creditors
rights generally and general principles of equity.

12.  Except as specifically amended herein, all terms, conditions and provisions
contained in the Agreement shall remain unchanged and in full force and effect.

IN WITNESS WHEREOF, the Parties have executed this Amendment on the day and year
first above set forth.

QWEST COMMUNICATIONS                          CORVIS Operations, Inc.
  CORPORATION

   /s/ James L. Becker                               /s/ Lynn D. Anderson
----------------------------------            ----------------------------------
         (SIGNATURE)                                (SIGNATURE)

       James L. Becker                                  Lynn D. Anderson
----------------------------------            ----------------------------------
         (PRINT)                              (PRINT)

      EVP - Network Ops. and Eng.                CFO
----------------------------------            ----------------------------------
         (TITLE)                               (TITLE)

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                                 ATTACHMENT 1.14

NEBS Level 1

GR-63
-----
- System Fire Test and Material / Components Criteria

GR-1089
-------
- Electrical SafetyA Listing Requirements
- Bonding and Grounding
- EMI-Emissions (or FCC Part 15 Compliance)
- Short Circuit TestA Lightning Immunity (Second Level)
- Current Limiting Protector Test
- AC Power Fault Immunity (Second Level)
- Voltage Limiting Protector Test

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                                 ATTACHMENT 3.1

                                   Price List

     ---------------------------------------------------------------------------
     Corvis ON Unified                                Ordering       Selling
     Network Platform                                   Code           Price
     T-ONG-F
     T-ONG-F LHN [*] Base Rack                                         $[*]
     T-ONG-F Expansion                                                 $[*]

     T-OA
     T-2                                                [*]            $[*]
     T-3                                                [*]            $[*]
     T-2 [*]                                                           $[*]
     T-3 [*]                                                           $[*]

     T-OADM
     T-OADM-HF [*]                                      [*]            $[*]
     T-OADM-SC [*]                                                     $[*]

     T-OS-F
     T-OS-F 3 port [*]                                  [*]            $[*]
     T-OS-F 4 port [*]                                  [*]            $[*]

     DCUs
     DCU Module                                                        $[*]
     GFF                                                               $[*]

     Miscellaneous
     Element Controller                                 [*]            $[*]
     [*] switch                                         [*]            $[*]
     Shelf Kit [*]                                                     $[*]

     Software RTU
     Optical Network Gateway [*]                        [*]            $[*]
     Optical Amplifiers [*]                             [*]            $[*]
     Optical Add/Drop Multiplexer [*]                   [*]            $[*]
     Optical Add/Drop Multiplexer [*]                                  $[*]
     Optical Switch [*]                                 [*]            $[*]

     Transport Interfaces
     OC-768 LH [*]                                                     $[*]
     OC-192LHN [*]                                                     $[*]
     [*] Mux Client Interface                                          $[*]
     OC-192HC [*]                                                      $[*]
     ---------------------------------------------------------------------------

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--------------------------------------------------------------------------------
                            DESCRIPTION                       PART      SELLING
                                                             NUMBER      PRICE

                         Corvis CorManager

     CNM Base - standard Fault, Configuration, Performance
     and Security Management                                   [*]        $[*]
     [*]
     CEI-ON/XF License                                         [*]        $[*]
     CWP License [*]                                           [*]        $[*]

     Additional Licenses
     CNM license for OCS                                       [*]        $[*]
     CNM license for ON Node (ONG, OADM, OS)                   [*]        $[*]
     CNM license for ON [*]                                    [*]        $[*]
     CNM license for ON [*]                                    [*]        $[*]
     CNM user seats                                            [*]        $[*]
     CWP user seats                                            [*]        $[*]

     Optional CNM Application Suite A
     Protection Management [*]                                 [*]        $[*]
     Path Management                                           [*]        $[*]
     OSS Gateway [*]                                           [*]        $[*]

     Complete CNM Optional Application Suite A Upgrade         [*]        $[*]

     Optional CNM Application Suite B
     TruePath Manager[*]                                       [*]        $[*]
     Multi-vendor Element Adapter                              [*]        $[*]

     Complete CNM Optional Application Suite B Upgrade         [*]        $[*]

     Optional CNM Application Suite C
     High-Availability                                         [*]        $[*]
     Disaster Recovery                                         [*]        $[*]
     Web Access                                                [*]        $[*]

     Complete CNM Optional Application Suite C Upgrade         [*]        $[*]

     CNM Hardware Platform
     High Availability / Disaster Recovery - [*]               [*]        $[*]

     Corvis Element Controller Optional Hardware

     Element Controller                                        [*]        $[*]
     [*] Switch                                                [*]        $[*]

     Corvis OCS TruePath Software

     TruePath Instant Provisioning and Restoration [*]         [*]        $[*]
     TruePath Bandwidth on Demand  [*]                         [*]        $[*]

     Corvis ON TruePath Software

     TruePath Instant Provisioning and Restoration  [*]
          Node (ONG, OADM and OS) RTU                          [*]        $[*]
          [*] RTU                                              [*]        $[*]
     TruePath Bandwidth on Demand  [*]
          Node (ONG, OADM and OS) RTU                          [*]        $[*]
          [*] RTU                                              [*]        $[*]

--------------------------------------------------------------------------------
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<PAGE>

<TABLE>
<CAPTION>
Corvis OCS                                                                  Ordering Code     Unit Selling Price
----------                                                                  -------------     ------------------
<S>                                                               <C>       <C>               <C>
OCS Racks

    Rack Assy, OCS US Telco                                        Each          [*]                 $[*]
         Power Distribution Control Unit, OCS                       1            [*]

    Fiber Management Kit, OCS Vertical                             Each          [*]                 $[*]
    Fiber Management Kit, OCS ETSI Vertical                        Each          [*]                 $[*]
    Fiber Management Kit, OCS Vertical w/ Cable Storage            Each          [*]                 $[*]

OCS Subracks

    Subrack Assy, OCS I/O-E US Telco                               Each          [*]                 $[*]
         Shelf Assy, OCS I/O-E                                      1            [*]                 $[*]
         *Fan Assy, OCS Upper                                       2            [*]                 $[*]
         *Filter, OCS Fan                                           1            [*]                 $[*]
         *Module Assy, Power Access                                 2            [*]

    Subrack Assy, OCS Center Stage US Telco                        Each          [*]                 $[*]
         Shelf Assy, OCS Center Stage                               1            [*]                 $[*]
         *Fan Assy, OCS Upper                                       2            [*]                 $[*]
         *Filter, OCS Fan                                           1            [*]                 $[*]
         *Module Assy, Power Access                                 2            [*]

    Shelf Cover Assy, Unpopulated Shelf                            Each          [*]                 $[*]

OCS I/O Modules

    OC-192/STM-64 Specific I/O Modules
    ==================================
    *Module Assy, OCS [*] OC-192/STM-64 [*]                        Each          [*]                 $[*]
    *Module Assy, OCS OC-192/STM-64 [*], SC Conn                   Each          [*]                 $[*]
    Module Assy, OCS OC-192/STM-64 [*] Filler                      Each          [*]                 $[*]

    OC-48/STM-16 Specific I/O Modules
    =================================
    *Module Assy, OCS [*] OC-48/STM-16 [*]                         Each          [*]                 $[*]
    *Module Assy, OCS OC-48/STM-16 [*], SC Conn                    Each          [*]                 $[*]
    Module Assy, OCS OC-48/STM-16 [*] Filler                       Each          [*]                 $[*]
    Module Assy, OCS I/O-E [*] Filler                              Each          [*]                 $[*]

OCS Switch Modules

    *Module Assy, OCS Switch Single Shelf  [*]                     Each          [*]                 $[*]
    *Module Assy, OCS Switch End Stage  [*]                        Each          [*]                 $[*]
    Module Assy, OCS, Switch, Filler                               Each          [*]                 $[*]
    *Module Assy, OCS Switch Center Stage                          Each          [*]                 $[*]

OCS Synchronization Module

    Module Assy, OCS Synchronization, US Telco Wire Wrap           Each          [*]                 $[*]
    Module Assy, OCS Synchronization, US Telco Bantam              Each          [*]                 $[*]

OCS Shelf Processor Modules

    *Module Assy, OCS Shelf Processor [*]                          Each          [*]                 $[*]
    Module Assy, OCS, SPROC, Filler                                Each          [*]                 $[*]

OCS Software

    OCS RTU per shelf                                              Each                              $[*]

---------------------------------------------------------------------------------------------------------
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</TABLE>

                                      -12-<PAGE>

                                                                   EXHIBIT 10.27

J. Michael Moore                                        Number of Shares 100,000

                            NONQUALIFIED STOCK OPTION
                                    UNDER THE
                      DIVERSIFIED CORPORATE RESOURCES, INC.
                       1998 NONQUALIFIED STOCK OPTION PLAN

     THIS AGREEMENT is executed by Diversified Corporate Resources, Inc., a
Texas corporation (herein called "Company") to evidence the grant to J. Michael
Moore (herein called "Optionee") of a stock option effective as of April 26,
2001.

     WHEREAS, the Optionee is an key employee of the Company; and

     WHEREAS, the Optionee has been granted an option to purchase shares of
common stock, par value $.10 per share (the "Common Stock"), of the Company
pursuant to the Company's 1998 Amended and Restated Nonqualified Stock Option
Plan, as amended (the "Plan"); and

     WHEREAS, the Company considers it desirable and in its best interests that
Optionee be given an opportunity to acquire an additional equity interest in the
Company in the form of an option to purchase shares of the Common Stock; and

     WHEREAS, this Option is granted under, and pursuant to the terms of the
Plan.

     NOW, THEREFORE, in consideration of the premises, it is agreed as follows:

     1. GRANT OF OPTION. The Company shall and does hereby grant to Optionee the
        ---------------
option (the "Option") to purchase 100,000 shares (the "Shares") of Common Stock
for the price per share in the manner and subject to the conditions hereinafter
provided.

     2. TIME OF EXERCISE, VESTING AND EXERCISE PRICE OF OPTION. Subject to the
        ------------------------------------------------------
terms hereof, the Option herein granted must be exercised in whole or in part at
any time or times prior to April 26, 2011. Subject to the terms hereof, the
Option herein granted shall become exercisable (i.e. shall vest) as to 12,500
shares of Common Stock per quarter on the last day of each

                                       1

<PAGE>

calendar quarter ended the last day of March, June, September and December
commencing with the quarter ended June 30, 2001, and ending with the quarter
ended March 31, 2003. The exercise price of the Option shall be $ 3.40 per
share, subject to adjustment as provided in the plan. The parties hereto
acknowledge and agree that (a), except as set forth below, such vesting is
contingent upon the Optionee being an officer of the Company as of any
applicable vesting date regardless of the reason that the Optionee may cease to
be an officer of the Company, and (b) subject to the restrictions herein as to
when the Option is exercisable, the Optionee shall have the right to select the
portion of the Option if and when the Optionee exercises any of this Option.

     If (i) a "Special Change in Control" occurs, and (ii) Optionee's employment
with the Company terminates for any reason other than Voluntary Termination or
Termination for Cause, during the twenty-four (24) month period immediately
following the Effective Date (as reasonably determined by the Committee) of such
Change in Control, then, notwithstanding the vesting schedule above, and any
other provision of this Agreement to the contrary, this Option will become
exercisable with respect to all of the Shares subject to this Option at the
exercise prices at which the Option would have been exercisable if the Optionee
had continued in employment through the dates set forth in the preceding
paragraph on which the Option would have been exercisable with respect to all of
the Shares, subject to this Option and will terminate as provided herein.

     For the purposes hereof, "Voluntary Termination" shall mean the Optionee's
resignation from the Company unless such resignation is as a direct proximate
result of (i) without Optionee's express written consent, the assignment to
Optionee of any duties materially inconsistent with his positions, duties,
responsibilities and status with the Company on the Effective Date of the
Special Change in Control, (ii) a reduction of Optionee's base compensation and
bonus to an amount which is greater than ten percent (10%) lower than such
compensation on the Effective Date of the Special Change In

                                       2

<PAGE>

Control, (iii) relocation of Optionee's principal location of work to any
location which is both (x) in excess of fifty (50) miles from the location of
Optionee's principal location of work on the Effective Date of the Special
Change in Control, and (y) in excess of the sum of the distance from Optionee's
principal residence on such Effective Date to the location of the Optionee's
principal location of work on such Effective Date, plus 50 miles, or (iv)
failure by the Company to require any successor (whether direct or indirect, by
purchase, merger, consolidation or otherwise) to all or substantially all of the
business and/or assets of the Company, by agreement in form and substance
reasonably satisfactory to the Optionee, expressly to assume and agree to
perform the obligations of the Company under his Employment Agreement and this
Agreement, or (v) any material breach of his Employment Agreement as in effect
on the Effective Date of the Special Change in Control, or this Agreement, by
the Company.

     For all purposes hereof, "Termination For Cause" shall mean Optionee's (i)
violation of any provision of this Agreement (but only after Optionee has
received written notice therof and been given a reasonable period, not less than
thirty (30) days, to cure said violation), or (ii) conviction of a felony, or a
misdemeanor involving moral turpitude.

     For all purposes hereof "Special Change in Control" means (i) any person or
entity, including a "group" as defined in Section 13(d)(3) of the Securities
Exchange Act of 1934, as amended (the "Exchange Act"), other than the Company, a
majority-owned subsidiary thereof or J. Michael Moore ("Moore") and any
affiliate of Moore, becomes the beneficial owner (as defined in Schedule 13(d)
under the Exchange Act) of the Company's securities having twenty-five percent
(25%) or more of the combined voting power of the then outstanding securities of
the Company that may be cast for the election of directors of the Company, or
(ii) as the result of, or in connection with, any cash tender or exchange offer,
merger or other business combination, sales of assets or contested election, or
any

                                       3

<PAGE>

combination of the foregoing transactions, less than a majority of the combined
voting power of the then outstanding securities of the Company or any successor
corporation or entity entitled to vote generally in the election of the
directors of the Company or such other corporation or entity after such
transaction are beneficially owned (as defined in Section 13(d) of the Exchange
Act) in the aggregate by the holders of the Company's securities entitled to
vote generally in the election of directors of the Company immediately prior to
such transaction, or (iii) during any period of two (2) consecutive years,
individuals who at the beginning of any such period constitute the Board of
Directors of the Company cease for any reason to constitute at least a majority
thereof, unless the election, or the nomination for election by the Company's
shareholders, of each director of the Company first elected during such period
was approved by a vote of at least two-thirds of the directors of the Company
then still in office who were directors of the Company at the beginning of any
such period. The "Effective Date" of such Special Change in Control shall be the
earlier of the date on which an event described in (i), (ii), or (iii) above
occurs, or (iv) if earlier, the date of the occurrence of the approval by
shareholders of an Agreement by the Company, the consummation of which would
result in an event described in (i), (ii), or (iii) above, or (v) if earlier,
the date of the acquisition of beneficial ownership, directly or indirectly, by
any entity, person or group (other than the Company, a majority-owned subsidiary
of the Company or Moore and any affiliate of Moore) of securities of the Company
representing five percent (5%) or more of the combined voting power of the
Company's outstanding securities, provided, however, that the events described
in (iv) and (v) will be considered the Effective Date of a Special Change in
Control only if they are followed within six (6) months by an event described in
(i), (ii) or (iii).

     3. METHOD OF EXERCISE. (a) In order to exercise this Option, in whole or in
        ------------------
part, the Optionee shall deliver to the Company at its principal place of
business, or at such other offices as

                                       4

<PAGE>

shall be designated by the Company (i) a written notice of such Optionee's
election to exercise this Option, which notice shall specify the number of
Shares to be purchased pursuant to such exercise and (ii) either (A) cash or a
check payable to the order of the Company, (B) notice that the exercise price is
satisfied by reduction of the number of Shares to be received by Optionee upon
exercise of this Option as provided in Section (b) below, with the amount of
such reduction specified in such notice, (C) shares of Common Stock having a
fair market value equal to the Exercise Price, or (D) a combination of the
above. The Company shall undertake to make prompt delivery of the stock
certificate(s) evidencing such part of the Shares, provided that if any law or
regulation requires the Company to take any action with respect to the Shares
specified in such notice before the issuance thereof, then the date of delivery
of such Shares shall be extended for the period necessary to take such action.

     (b) At the election of the Optionee, the Optionee may exercise this Option
without a cash payment of the exercise price by designating that the number of
Shares issuable to Optionee upon such exercise shall be reduced by the number of
Shares having a fair market value equal to the amount of the total Exercise
Price for such exercise. In such instance, no cash or other consideration will
be paid by the Optionee in connection with such exercise and no commission or
other remuneration will be paid or given by the Optionee or the Company in
connection with such exercise.

     (c) For all purposes relating to the surrender or delivery of Shares in
satisfaction of obligations described in subsection (a) and (b) of this Section
3, the fair market value of the shares of Common Stock delivered or surrendered
shall be determined as of the business day next preceding the date of their
surrender or delivery, and shall mean the price at which such shares would
exchange hands between a willing buyer and willing seller, neither of whom are
under compulsion to buy or sell, as reasonably determined by the Committee;
provided, however, that so long as such shares are listed

                                       5

<PAGE>

on a national stock exchange or quoted on the National Association of Securities
Dealers Automated Quotation System ("NASDAQ"), it shall mean the closing sale
price (or, if no closing sale price is quoted, the mean between the closing bid
and sale price) of such shares on such exchange or on NASDAQ on such next
business day, or, if no such shares were traded on such business day, the
closing sale price (or, if no closing sale price is quoted, the mean between the
closing bid and sale price) on the next preceding business day on which such
shares were traded.

     (d) Upon the exercise of an Option, and before the transfer of Shares, the
Optionee shall be required to pay to the Company, in cash or in Shares
(including, but not limited to, the reservation to the Company of the requisite
number of Shares otherwise payable to such person with respect to such Option in
the manner described in (b)) the amount which the Company reasonably determines
to be necessary in order for the Company to comply with applicable federal or
state tax withholding requirements, and the collection of employment taxes;
provided, further, that the Committee may require that such payment be made in
cash.

     4. TERMINATION OF OPTION. To the extent not theretofore exercised, the
        ---------------------
Option herein granted shall terminate with respect to all such Shares
immediately upon Optionee's termination of employment for any reason, and shall
terminate with respect to Shares, which have vested on the earlier of (a) August
9, 2011, (b) 180 days from the date on which Optionee's employment with the
Company is terminated for any reason other than the death or disability of the
Optionee, and (c) one (1) year from the date on which Optionee's employment with
the Company is terminated if such termination is due to death or disability of
the Optionee.

     5. RIGHTS PRIOR TO EXERCISE OF OPTION. The Option herein granted is
        ----------------------------------
nontransferable by Optionee except as herein otherwise provided. This Option may
be pledged for the sole purpose of exercising stock options granted to the
Optionee by the Company to purchase

                                       6

<PAGE>

shares of Common Stock of the Company. Unless the Optionee is deceased or
disabled, with the determination of the existence or nonexistence of such
disability such disability left to the reasonable discretion of the Committee,
or pledged as permitted hereunder, the Option herein may only be exercised by
the Optionee. If the Optionee dies during the period of time that all or any of
part of this Option is exercisable, the Optionee's executor or legal
representative may exercise all or any part of this Option with respect to the
Shares which are vested, at any time or times prior to the termination of the
Option. If the Optionee is disabled, as aforesaid, the Optionee's legal
representative may exercise all or any part of this Option with respect to the
Shares which are vested, at any time or times prior to the termination of the
Option. Optionee shall have no rights as a stockholder with respect to the
Shares until payment of the Exercise Price for the Shares purchased by exercise
of the Option, and the issuance of the Shares involved.

     6. BINDING EFFECT. Without limitation, the Option herein granted is issued
        --------------
under, and granted in all respects subject to all of the provisions of, the
Plan, all of which provisions of the Plan are incorporated herein by reference;
provided, however, without limitation, that the provisions of this Agreement
will determine the agreement of the parties with respect to each matter set
forth herein to the extent the provisions of this Agreement do not require a
result that is inconsistent with the Plan; and provided, finally, that the
parties expressly agree that no inference shall be drawn with respect to the
intent of the parties based on the inclusion of, or reference to, some
provisions of the Plan in this Agreement, and the omission of such inclusion or
reference with respect to other provisions of the Plan in this Agreement; and
provided, finally, that this Agreement shall be binding upon and inure to the
benefit of the Company, and its representatives, successors and assigns, and the
Optionee and his or her legal representative (to the extent expressly
permitted).

                                       7

<PAGE>

     7. MULTIPLE ORIGINALS. This Agreement may be executed in multiple
        ------------------
counterparts with each counterpart constituting an original for all purposes.

     8. AMENDMENT. This Agreement may not be amended or revised in such a manner
        ---------
as to impair the rights of the Optionee without Optionee's written consent.

     9. TOTAL AGREEMENT. This Agreement may not be amended or revised except by
        ---------------
a written instrument executed by both of the parties to this Agreement.

     10. COMMITTEE AUTHORITY. Any questions concerning the interpretation of
        --------------------
this Agreement, including without limitation the incorporated provisions of the
Plan, shall be determined by the Committee in its reasonable discretion.

     IN WITNESS WHEREOF, the Company has caused this Agreement to be executed
effective as of the April 26, 2001.

                                        DIVERSIFIED CORPORATE RESOURCES, INC.

                                        By:
                                             -----------------------------------
                                             Anthony G. Schmeck, Treasurer

                                             -----------------------------------
                                             J. Michael Moore

                                       8

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