Tellabs is a telecommunications equipment company that provides solutions for mobile, optical, and business networks. They offer a range of products and services, including mobile backhaul, packet optical networking, and professional services. Tellabs has a global presence, with customers in over 90 countries around the world. They were founded in 1975 and are based in Naperville, Illinois. Tellabs has a strong commitment to sustainability and corporate responsibility, and has been recognized for their efforts in these areas. They are a publicly traded company, listed on the NASDAQ stock exchange under the ticker symbol TLAB.