FOR IMMEDIATE RELEASE
July 12, 2012

Tellabs will issue second-quarter results on July 26

Investor teleconference Friday, July 27

Naperville, Ill. — Tellabs will issue a news release with its second-quarter results on www.tellabs.com after the close of market on Thursday, July 26. The company will host an investor teleconference to discuss its second-quarter 2012 results at 9:00 a.m. Central Time on Friday, July 27.

To access a simultaneous webcast of the teleconference, go to the Tellabs website at http://www.tellabs.com/investors and click on the webcast icon. From this site, you can download the necessary software and listen to the teleconference. Tellabs encourages you to review the site before the teleconference to ensure your computer is configured properly.

A taped replay of the call will be available at approximately noon. Central Time on Friday, July 27. This toll-free replay will be available until midnight Central Time on Tuesday, July 31. A podcast of the call will be posted at http://www.tellabs.com/news/feeds on the afternoon of July 27.

To listen to the teleconference replay, call 855-859-2056. (Outside the United States, call 404-537-3406.) When prompted, enter the Tellabs conference ID number: 99082875

About Tellabs – Tellabs innovations advance the smart mobile Internet and help our customers succeed. That's why 80% of the top global communications service providers choose our mobile backhaul, packet optical, business and services solutions and applications. We help them get ahead by adding revenue, reducing expenses and optimizing networks.

Tellabs (Nasdaq: TLAB) is part of the NASDAQ Global Select Market, Ocean Tomo 300® Patent Index, the S&P MidCap 400 Index and several corporate responsibility indexes including the Maplecroft Climate Innovation Index, FTSE4Good and eight FTSE KLD indexes. www.tellabs.com

MEDIA CONTACT:

George Stenitzer
+1.630.798.3800

INVESTOR CONTACT:

Tom Scottino
+1.630.798.3602

(View media contact list.)


Tellabs® and the Tellabs logo are trademarks of Tellabs or its affiliates in the United States and/or other countries. Any other company or product names mentioned herein may be trademarks of their respective companies.