EX-23.1 3 dex231.htm CONSENT OF PRICEWATERHOUSECOOPERS LLP CONSENT OF PRICEWATERHOUSECOOPERS LLP

EXHIBIT 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 (Nos. 333-45502, 333-90839, 333-51486, 333-52562 and 333-104353) of Sycamore Networks, Inc. of our report dated September 25, 2007 relating to the financial statements and the effectiveness of internal control over financial reporting, which appears in this Form 10-K.

PricewaterhouseCoopers LLP

Boston, Massachusetts

September 25, 2007