Tellabs, Inc. is a telecommunications company that designs and manufactures equipment for service providers. Ranked among the BusinessWeek InfoTech 100, Tellabs is part of the NASDAQ Global Select Market, Ocean Tomo 300 Patent Index and until December 20, 2011 was included in the S&P 500. Over one third of the world's wireless calls travel via networks owned by Tellabs customers such as T-Mobile and Verizon Communications. Tellabs, Inc. is a telecommunications company that designs and manufactures equipment for service providers. Ranked among the BusinessWeek InfoTech 100, Tellabs is part of the NASDAQ Global Select Market, Ocean Tomo 300 Patent Index and until December 20, 2011 was included in the S&P 500. Over one third of the world's wireless calls travel via networks owned by Tellabs customers such as T-Mobile and Verizon Communications.