DZS INC. - FORM 10-K - EX-23.1 - CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM - March 15, 2011

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10-K - FORM 10-K - DZS INC.d10k.htm
EX-21.2 - LIST OF SUBSIDIARIES - DZS INC.dex212.htm
EX-32.1 - SECTION 1350 CERTIFICATION OF CHIEF EXECUTIVE OFFICER & CHIEF FINANCIAL OFFICER - DZS INC.dex321.htm
EX-31.1 - CERTIFICATION OF CHIEF EXECUTIVE OFFICER PURSUANT TO RULE 13A-14(A)/15D-14(A) - DZS INC.dex311.htm
EX-31.2 - CERTIFICATION OF CHIEF FINANCIAL OFFICER PURSUANT TO RULE 13A-14(A)/15D-14(A) - DZS INC.dex312.htm
EX-10.23 - MARCH 2011 AMENDMENT TO LOAN DOCUMENTS - DZS INC.dex1023.htm
EX-10.22 - JANUARY 2011 AMENDMENT TO LOAN DOCUMENTS - DZS INC.dex1022.htm

Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

The Board of Directors

Zhone Technologies, Inc.:

We consent to the incorporation by reference in the registration statements on Form S-3 (Nos. 333-115306 and 333-113320) and in the registration statements on From S-8 (Nos. 333-165510, 333-158009, 333-155321, 333-149598, 333-141153, 333-134217, 333-132336, 333-128092, 333-123369, 333-117142, 333-110713, 333-98855, 333-88732, 333-83422, 333-73352, and 333-61956) of Zhone Technologies, Inc. (the Company) of our report dated March 15, 2011, with respect to the consolidated balance sheets of Zhone Technologies, Inc. and subsidiaries as of December 31, 2010 and 2009, and the related consolidated statements of operations, stockholders’ equity and comprehensive income, and cash flows for each of the years in the three-year period ended December 31, 2010, which report appears in the December 31, 2010 annual report on Form 10-K of the Company.

/s/ KPMG LLP

San Francisco, California

March 15, 2011

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