FOR IMMEDIATE RELEASE
July 14, 2010

Tellabs to announce second-quarter results on July 27

Naperville, Ill. — Tellabs will host an investor teleconference to discuss its second quarter 2010 results at 7:30 a.m. Central Daylight Time on Tuesday, July 27. 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 website 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 27. This toll-free replay will be available until 10:30 p.m. Central Daylight Time on Thursday, July 29. A podcast of the call will be posted at www.tellabs.com/news/feeds/ on the afternoon of July 27.

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: 87289867.

About Tellabs — Tellabs innovates to deliver the mobile Internet and help our customers succeed. That’s why 43 of the top 50 global communications service providers choose our mobile, optical, business and services solutions. 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 500 and several corporate responsibility indexes including the Maplecroft Climate Innovation Index, FTSE4Good and eight FTSE KLD indexes. http://www.tellabs.com

MEDIA CONTACT:

Marta Kwiatek
+1.630.798.2524

INVESTOR CONTACT:

Tom Scottino
+1.630.798.3602

(View media contact list.)


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