Tellabs, Inc. designs, develops and supports telecommunications networking products. The company serves telecom service providers, independent operating companies, multiple system operator cable companies, enterprises and government agencies. It operates through four segments: Optical, Data, Access and Services. The Optical segment includes solutions that enable service providers to manage network bandwidth by adding capacity when and where needed. The Data segment products include next-generation packet-switched products that enable wireless and wireline carriers to deliver mobile voice and internet services and wireline business services to their customers. The Access segment products enable service providers to deliver bundled voice, video and high-speed Internet and data services over the last mile of copper or fiber networks. The Services segment delivers deployment, training, support and professional services to Tellabs customers. The company was founded by Michael J. Birck in 1975 and is headquartered in Naperville, IL.