FOR IMMEDIATE RELEASE
July 10, 2008

Tellabs to announce second-quarter results on July 22

Naperville, Ill. — Tellabs will host an investor teleconference to discuss its second-quarter 2008 results at 7:30 a.m. Central Daylight Time on Tuesday, July 22. The results news release will be available on www.tellabs.com at 6:00 a.m. Central Daylight Time that day.

To access a simultaneous webcast of the teleconference, go to the Tellabs Web site at www.tellabs.com 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 10:30 a.m. Central Daylight Time on July 22. This toll-free replay will be available until midnight Central Daylight Time on Thursday, July 24. A podcast of the call will be posted at www.tellabs.com/news/feeds/ on the afternoon of July 22.

To listen to the teleconference replay, call 800-642-1687. (Outside the United States, call 706-645-9291.) When prompted, enter the Tellabs conference ID number: 54800101.

Tellabs advances telecommunications networks to meet the evolving needs of users. Solutions from Tellabs enable service providers to deliver high-quality voice, video and data services over wireline and wireless networks around the world. Tellabs (NASDAQ: TLAB) is part of the NASDAQ Global Select Market, Ocean Tomo 300™ Patent Index and the S&P 500. www.tellabs.com

MEDIA CONTACT:

Marta Kwiatek
+1.630.798.2524

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.