UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT
Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934

Date of Report (Date of earliest event reported) – October 21, 2004

TOLLGRADE COMMUNICATIONS, INC.

(Exact Name of Registrant as Specified in Its Charter)

Pennsylvania	000-27312	25-1537134
(State or other jurisdiction	(Commission	(IRS Employer
of incorporation)	File Number)	Identification No.)

493 Nixon Road
Cheswick, Pennsylvania 15024
(Address of Principal Executive Offices) (Zip code)

Registrant’s telephone number, including area code — (412) 820-1400

N/A
(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

o Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

o Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

o Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

TABLE OF CONTENTS

Exhibit 99.1

ITEM 2.02 RESULTS OF OPERATIONS AND FINANCIAL CONDITION

On October 21, 2004, Tollgrade Communications, Inc. held its third quarter 2004 conference call. A transcript of the call is attached hereto as Exhibit 99.1.

This information shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such a filing.

ITEM 9.01 FINANCIAL STATEMENTS AND EXHIBITS

Exhibit
Number	Description
99.1	Transcript of Tollgrade Communications, Inc. third quarter 2004 earnings call.

SIGNATURES

     Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

	TOLLGRADE COMMUNICATIONS, INC.
Date: October 21, 2004	By:	/s/Christian L. Allison
		Christian L. Allison
		Chief Executive Officer

EXHIBIT INDEX
(Pursuant to Item 601 of Regulation S-K)

Exhibit
Number	Description and Method of Filing
99.1	Transcript of Tollgrade Communications, Inc. third quarter 2004 earnings call, filed herewith.