TOLLGRADE COMMUNICATIONS INC \PA\

Q: Mar 31 2011

FY: Dec 31 2010

Q: Sep 30 2010

Q: Jun 30 2010

Q: Mar 31 2010

FY: Dec 31 2009

Q: Sep 26 2009

Q: Jun 27 2009

Q: Mar 28 2009

FY: Dec 31 2008

FY: Dec 31 2008

Q: Sep 27 2008

Q: Jun 28 2008

Q: Mar 29 2008

FY: Dec 31 2007

Q: Sep 29 2007

Q: Jun 30 2007

Q: Mar 31 2007

FY: Dec 31 2006

Q: Sep 30 2006

Completion of Acquisition or Disposition of Assets

Submission of Matters to a Vote of Security Holders

Other Events

5.02

1.01,5.02,8.01,9.01

Results of Operations and Financial Condition

Results of Operations and Financial Condition

1.01

5.02,9.01

2.02,9.01

5.02,7.01,9.01

Submission of Matters to a Vote of Security Holders

Results of Operations and Financial Condition

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

Results of Operations and Financial Condition

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

Changes in Registrant's Certifying Accountant

Results of Operations and Financial Condition

5.02

8.01

Post Effective Amendment to S-8

Certification of termination of registration of a class of securities (Section 12(g))

Post Effective Amendment to S-8

Post Effective Amendment to S-8

Post Effective Amendment to S-8

Post Effective Amendment to S-8

Post Effective Amendment to S-8

Post Effective Amendment to S-8

Post Effective Amendment to S-8

Post Effective Amendment to S-8

Notification of removal from listing and/or registration on a national securities exchange

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Certification of termination of registration of a class of securities (Section 12(g))

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Post Effective Amendment to S-8

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Additional Information for Proxy Statement/ Votes

No description available

No description available

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional proxy soliciting materials filed by a non-management party

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional proxy soliciting materials filed by a non-management party

Additional Information for Proxy Statement/ Votes

Additional proxy soliciting materials filed by a non-management party

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional proxy soliciting materials filed by a non-management party

Additional Information for Proxy Statement/ Votes

Additional proxy soliciting materials filed by a non-management party

Additional proxy soliciting materials filed by a non-management party

DIMENSIONAL FUND ADVISORS LP

DIMENSIONAL FUND ADVISORS LP

RENAISSANCE TECHNOLOGIES LLC

HEIBEL RICHARD H M D

SOLOMON JEFFREY M

CHANDLER SCOTT C

HOFFMAN CHARLES E

KAMPMEINERT ROBERT W

KENNEDY EDWARD H

MEYERCORD EDWARD

BORNAK MICHAEL D

King Robert H.

Nulty Gregory M

OBRIEN JOSEPH G

Lang Mark C.

Reinke Jennifer Marie

Starboard Value LP

WELLINGTON MANAGEMENT CO LLP

WELLINGTON TRUST Co N A

RENAISSANCE TECHNOLOGIES LLC

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

Correspondence with the SEC

Annual Report Scanned (Paper)

Letter from the SEC

Letter from the SEC

Letter from the SEC

Correspondence with the SEC

Correspondence with the SEC

Correspondence with the SEC

Correspondence with the SEC

Correspondence with the SEC

Letter from the SEC

Correspondence with the SEC

Correspondence with the SEC

Letter from the SEC