The transmission overhauls ADC Telecommunications performs don't leave grease stains on the driveway. The company generates three-fourths of its sales from broadband data access and infrastructure equipment. Its products (central office service platforms, broadband switches and routers, and wireless gear) are used to transmit voice and data signals and connect communications providers with their subscribers. ADC also provides network management software and integration services. The company caters to local, long-distance, wireless telephone and cable TV providers; it also sells to distributors and other equipment makers. Customers include BellSouth, CIENA , Graybar Electric , and Time Warner Cable.