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FOR IMMEDIATE RELEASE
May 20, 2010

Tellabs investor presentations to be webcast live

Naperville, Ill. — Robert W. Pullen, Tellabs president and chief executive officer, and Timothy J. Wiggins, Tellabs executive vice president and chief financial officer, will speak to the investment community at the following conferences:

• Timothy J. Wiggins will speak to the investment community at Barclays Capital 2010 Global Communications Media and Technology Conference in New York City, on Wednesday, May 26, at 1:45 p.m. Eastern Time. Click here to access webcast.

• Robert W. Pullen will speak to the investment community at the Bank of America Merrill Lynch U.S. Technology Conference in New York City, on Wednesday, June 2, at 9:45 a.m. Eastern Time. Click here to access webcast.

• Timothy J. Wiggins will speak to the investment community at UBS Global Technology and Services Conference in New York City, on Thursday, June 10, at 3 p.m. Eastern Time. Click here to access webcast.

Interested investors can access live audio webcasts of the presentations at www.tellabs.com. On-demand replays of the webcasts will be available starting 24 hours after each presentation and will be archived for 30 days.

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.)


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.