Exhibit 99.1

JOINT FILING AGREEMENT

In accordance with Rule 13d-1(k)(1)(iii) under the Securities Exchange Act of 1934, as amended, the persons named below agree to the joint filing on behalf of each of them of a Statement on Schedule 13D filed on June 9, 2008 (including additional amendments thereto) with respect to the shares of Common Stock, par value $.20 per share, of Tollgrade Communications, Inc.  This Joint Filing Agreement shall be filed as an Exhibit to such Statement.

Dated:   June 9, 2008

STARBOARD VALUE AND OPPORTUNITY MASTER FUND LTD. By: RCG Starboard Advisors, LLC,        its investment manager   PARCHE, LLC By: RCG Starboard Advisors, LLC,        its managing member   RCG ENTERPRISE, LTD By: Ramius LLC,        its investment manager   RCG STARBOARD ADVISORS, LLC By: Ramius LLC,        its sole member     RAMIUS LLC By: C4S & Co., L.L.C.,        as managing member   C4S & CO., L.L.C.  

By:	/s/ Jeffrey M. Solomon
	Name: Jeffrey M. Solomon
	Title: Authorized Signatory

/s/ Jeffrey M. Solomon

JEFFREY M. SOLOMON

Individually and as attorney-in-fact for Peter A.

Cohen, Morgan B. Stark and Thomas W. Strauss