EXHIBIT 10.23

 

Amendment No. 4

to the United States Reseller Agreement between

Sycamore Networks, Inc.

and

Sprint Communications Company, L.P. Government Systems Division

 

This Amendment No. 4 (the “Amendment”), effective as of June 1, 2005 (the
“Effective Date”), to the United States Reseller Agreement by and between
Sycamore Networks, Inc. (“Sycamore”) and Sprint Communications Company, L.P.
(“Sprint”) which agreement is dated January 6, 2004, as amended (the “Reseller
Agreement”). Sycamore and Sprint are collectively referred to herein as the
“Parties.”

 

WHEREAS, Attachment I-2 to the Reseller Agreement contains a list of the Labor
Categories that Sycamore offers for sale/license to Sprint under the Reseller
Agreement;

 

WHEREAS, the Parties wish to replace the existing Attachment I-2 with a new
attachment containing updated Labor Categories and prices, and;

 

WHEREAS, there are no other changes to the Agreement by this Amendment.

 

NOW, THEREFORE, for good and valuable consideration the receipt and sufficiency
of which is hereby acknowledged, the Parties hereby agree to modify the Reseller
Agreement as follows:

 

1. Capitalized terms used herein and not otherwise defined herein shall have
such meaning as set forth in the Reseller Agreement.

 

2. Attachment I-2 to the Reseller Agreement is hereby replaced with the document
attached hereto and incorporated herein labeled “Attachment I-2, Rev. 2.”

 

3. In the event of a conflict between the terms and conditions of this Amendment
and the Reseller Agreement, this Amendment shall prevail. Except as expressly
modified in this Amendment, all other terms and conditions of the Reseller
Agreement shall remain in full force and effect.

 

IN WITNESS WHEREOF, the parties have caused this Amendment No. 4 to be executed
in duplicate by their respective, duly authorized representatives:

 

SYCAMORE NETWORKS, INC.

     

SPRINT COMMUNICATIONS COMPANY, L.P.

By:

         

By:

   

Name:

         

Name:

   

Title:

         

Title:

   

Date:

         

Date:

   

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Attachment I-2, Rev 2

 

         Option
YR 1
(thru
09-30-03)

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  Option
YR 2

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  Option
YR 3

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  Option
YR 4

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  First
Award

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  Second
Award

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  Third
Award

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  Fourth
Award

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LABOR CATEGORIES

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  Labor
Rate at
Customer
Site

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  Labor
Rate at
Customer
Site

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

  Labor
Rate at
Customer
Site

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

  Labor
Rate at
Customer
Site

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

  Term
Period

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

  Term
Period

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

  Term
Period

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

  Term
Period

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1    Communications Specialist LEVEL II   [*]   [*]   [*]   [*]   [*]   [*]  
[*]   [*] 2    Communications Specialist LEVEL III   [*]   [*]   [*]   [*]   [*]
  [*]   [*]   [*] 3    Communications Hardware Installation Technician LEVEL III
  [*]   [*]   [*]   [*]   [*]   [*]   [*]   [*] 4    Communications Network
Specialist Level III   [*]   [*]   [*]   [*]   [*]   [*]   [*]   [*] 5   
Network Design Engineer Level II   [*]   [*]   [*]   [*]   [*]   [*]   [*]    
Notes:                                     

A      Communications Specialist LEVEL II, Communications Specialist Level III
and Communications Hardware Installation Technician Level III are for onsite
technical troubleshooting. 8 hour minimum for each.

B      Communications Network Specialist Level III and Network Design Engineer
Level II would be a full-time, onsite dedicated resource. 6 month [*] engagement
minimum.

 

* Certain information on this page has been omitted and filed separately with
the Securities and Exchange Commission. Confidential Treatment has been
requested with respect to the omitted portions. Asterisks within brackets denote
omission.