Exhibit 10.3

NOTE: Information in this document marked with an “[*]” has been omitted and
filed separately with the Commission. Confidential treatment has been requested
with respect to the omitted portions.

 

1

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SUPPLEMENT A

   Agreement Number: PARA-SIA-120102

This equipment Supplement A, [*], including Attachment B, Financial Terms and
Discounts and Attachment C, Supplier Specifications (hereinafter, the “[*]
Devices Supplement”), dated as of July 14, 2006 between Carrier Access
Corporation, with its principal office located at 5395 Pearl Parkway, Boulder,
Colorado 80301 (hereinafter “Supplier”), and Cingular Wireless LLC, on behalf of
its Affiliates, having an office at 5565 Glenridge Connector, Atlanta, Georgia
30342, a Delaware limited liability company (“Cingular”). If a conflict exists
between the terms and conditions contained in the Master Supplier Agreement
dated as of December 1, 2002 between Supplier and Cingular (the “MSA”) and those
contained in this [*] Devices Supplement, the terms and conditions contained in
this [*] Devices Supplement shall prevail for purposes of [*] Devices Supplement
only. This [*] Devices Supplement shall not limit, including by omission
thereof, any of the terms and conditions included in the MSA, unless expressly
identified and stated to the contrary herein, and then, only to the extent of
this [*] Devices Supplement.

 

1. SCOPE

This [*] Devices Supplement in conjunction with the MSA describes the terms and
conditions under which Supplier will make available for purchase by Cingular its
[*] Devices (the “[*] Devices”).

 

2. TERM OF SUPPLEMENT

 

  a. The term of the [*] Devices Supplement is effective on July 14, 2006 (the
“Supplement Effective Date”) and, unless terminated or canceled as provided in
the MSA, shall remain in effect for three (3) years (the “Supplement Initial
Term”).

 

  b. After the Supplement Initial Term, this [*] Devices Supplement shall
continue [*] until terminated by either party upon [*] days prior written notice
to the other setting forth the effective date of such termination. The
termination, cancellation or expiration of this [*] Devices Supplement shall not
affect the obligations of either party to the other party pursuant to any Order
previously executed hereunder, and the terms and conditions of this [*] Devices
Supplement shall continue to apply to such Order as if this [*] Devices
Supplement had not been terminated or canceled.

 

3. USAGE OF DEFINITIONS

Capitalized terms used in this [*] Devices Supplement and not defined herein are
used as defined in the MSA, except for definitions appearing in or modified by
this [*] Devices Supplement or associated Attachments, Exhibits, and Schedules.
Definitions that conflict with the definitions set forth in the MSA shall have
the meaning set forth herein.

PRIVATE/PROPRIETARY/LOCK

Contains private and/or proprietary information. May not be used or disclosed
outside Cingular or Supplier except pursuant to a written Agreement.

[*] Certain information on this page has been omitted and filed separately with
the Commission. Confidential treatment has been requested with respect to the
omitted portions.

 

2

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SUPPLEMENT A

   Agreement Number: PARA-SIA-120102

 

4. WARRANTY

For purposes of the [*] Devices Supplement only, section 3.37c of the MSA is
replaced with the following:

The warranty period for Materials shall be the longer of the warranty period
stated in the Work Order, the Specifications, the applicable OEM’s warranty, or
[*]. The warranty period in all cases shall commence [*].

[*], Supplier will provide the following warranty during the applicable warranty
period.

[*]

 

  a. [*]

 

  b. [*]

 

5. PURCHASE COMMITMENT

Cingular agrees that such pricing offered to Cingular is based upon Supplier
[*].

 

6. INCORPORATION BY REFERENCE

This [*] Devices Supplement is subject to all the terms, conditions, and
provisions of the MSA, except for the terms, conditions, and provisions
appearing in or modified by this [*] Devices Supplement with respect to Services
and Products.

 

7. [*]

[*]

 

8. The following Product Supplement A Attachments are attached hereto and
incorporated by this reference: Attachment B-[*]; Attachment C-[*]; And
Attachment D-[*].

 

9. TRAINING

Supplier will provide [*] courses in the first year of this [*] Devices
Supplement, [*] a location and time to be mutually agreed to by both parties as
a condition of contract signage. Training not scheduled and performed in the
first year following execution of this [*] Devices Supplement shall expire, and
shall not carry-over into any subsequent annual period. Cingular may purchase
additional training at the then-current rate at any time.

 

10. [*]

[*]

 

PRIVATE/PROPRIETARY/LOCK

Contains private and/or proprietary information. May not be used or disclosed
outside CINGULAR or SUPPLIER except pursuant to a written Agreement.

[*] Certain information on this page has been omitted and filed separately with
the Commission. Confidential treatment has been requested with respect to the
omitted portions.

 

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SUPPLEMENT A

   Agreement Number: PARA-SIA-120102

 

11. [*]

[*]

 

  (a) [*]

 

  (b) [*]

 

  (c) [*]

 

  (d) [*]

Supplier shall provide the [*] to the following Cingular contact (or such other
designated Cingular contact for which written notice is provided to Supplier):

[*]

[*]

Carrier Access Corporation

[*]

 

12. MASTER SUPPLIER AGREEMENT AMENDMENTS.

 

  A. [*]

[*]

[*]

 

  B. § 3.26 is hereby amended as follows:

 

Notice to Supplier shall be:

  

Carrier Access Corporation

  

5395 Pearl Parkway

  

Boulder, CO 80301

  

Attn: Chief Financial Officer

  

with a copy to: Legal Department

 

  C. § 4.3 (a) is hereby amended such that the Continuing Availability period
shall be [*].

 

  D. § 4.4 is hereby amended such that the Customer Support Number is
1-800-786-9929.

 

PRIVATE/PROPRIETARY/LOCK

Contains private and/or proprietary information. May not be used or disclosed
outside CINGULAR or SUPPLIER except pursuant to a written Agreement.

[*] Certain information on this page has been omitted and filed separately with
the Commission. Confidential treatment has been requested with respect to the
omitted portions.

 

4

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SUPPLEMENT A

   Agreement Number: PARA-SIA-120102

 

IN WITNESS WHEREOF, this [*] Devices Supplement has been executed by the duly
authorized representatives of each party, as of the Supplement Effective Date.

 

CARRIER ACCESS CORPORATION     CINGULAR WIRELESS LLC     On behalf of its
Affiliates

By:

 

/s/

   

By:

 

/s/

Name:          Name:      Title:          Title:     

 

PRIVATE/PROPRIETARY/LOCK

Contains private and/or proprietary information. May not be used or disclosed
outside CINGULAR or SUPPLIER except pursuant to a written Agreement.

[*] Certain information on this page has been omitted and filed separately with
the Commission. Confidential treatment has been requested with respect to the
omitted portions.

 

5

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SUPPLEMENT A

   Agreement Number: PARA-SIA-120102

 

INDEX OF ATTACHMENTS TO THE

[*] DEVICES SUPPLEMENT A

 

ATTACHMENT A

  

INTENTIONALLY LEFT BLANK

ATTACHMENT B

  

[*]

ATTACHMENT C

  

[*]

ATTACHMENT D

  

[*]

 

PRIVATE/PROPRIETARY/LOCK

Contains private and/or proprietary information. May not be used or disclosed
outside CINGULAR or SUPPLIER except pursuant to a written Agreement.

[*] Certain information on this page has been omitted and filed separately with
the Commission. Confidential treatment has been requested with respect to the
omitted portions.

 

6

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SUPPLEMENT A

   Agreement Number: PARA-SIA-120102

 

ATTACHMENT B: [*]

[*]

 

PRIVATE/PROPRIETARY/LOCK

Contains private and/or proprietary information. May not be used or disclosed
outside CINGULAR or SUPPLIER except pursuant to a written Agreement.

[*] Certain information on this page has been omitted and filed separately with
the Commission. Confidential treatment has been requested with respect to the
omitted portions.

 

7

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SUPPLEMENT A

   Agreement Number: PARA-SIA-120102

 

ATTACHMENT C: [*]

[*]

 

PRIVATE/PROPRIETARY/LOCK

Contains private and/or proprietary information. May not be used or disclosed
outside CINGULAR or SUPPLIER except pursuant to a written Agreement.

[*] Certain information on this page has been omitted and filed separately with
the Commission. Confidential treatment has been requested with respect to the
omitted portions.

 

8

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SUPPLEMENT A

   Agreement Number: PARA-SIA-120102

 

ATTACHMENT C: [*]

[*]

 

PRIVATE/PROPRIETARY/LOCK

Contains private and/or proprietary information. May not be used or disclosed
outside CINGULAR or SUPPLIER except pursuant to a written Agreement.

[*] Certain information on this page has been omitted and filed separately with
the Commission. Confidential treatment has been requested with respect to the
omitted portions.

 

9

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SUPPLEMENT A

   Agreement Number: PARA-SIA-120102

 

ATTACHMENT D: SERVICE [*] AGREEMENT

[*]

 

PRIVATE/PROPRIETARY/LOCK

Contains private and/or proprietary information. May not be used or disclosed
outside CINGULAR or SUPPLIER except pursuant to a written Agreement.

[*] Certain information on this page has been omitted and filed separately with
the Commission. Confidential treatment has been requested with respect to the
omitted portions.

 

10