FOR IMMEDIATE RELEASE
July 10, 2006

Tellabs to announce second-quarter 2006 results on July 27

Naperville, Ill. — Tellabs will host an investor teleconference to discuss its second-quarter 2006 results at 7:30 a.m. Central Daylight Time on Thursday, July 27. The results news release will be available on http://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 beginning at approximately 10:30 a.m. Central Daylight Time, July 27. This toll-free replay will be available until 10:30 a.m. Central Daylight Time on Monday, July 31. A podcast of the call will be available at www.tellabs.com/news/feeds/ 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: 2720285.

About Tellabs
Tellabs advances telecommunications networks to meet the evolving needs of users. Broadband solutions from Tellabs enable service providers to deliver high-quality voice, video and data services over wireline and wireless networks around the world. Ranked among the BusinessWeek InfoTech 100, Tellabs (NASDAQ: TLAB) is part of the NASDAQ-100 Index, NASDAQ Global Select Market and the S&P 500. www.tellabs.com

MEDIA CONTACT:

Ariana Nikitas
+1.630.798.2532

INVESTOR CONTACT:

Tom Scottino
+1.630.798.3602

(View media contact list.)

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