National Broadcasting Co. Inc. (nbc--New York City) has signed a multi-year contract extension with

National Broadcasting Co. Inc. (nbc--New York City) has signed a multi-year contract extension with Williams Vyvx Services (Tulsa, OK) to expand the broadcast transmission services it buys from the video carrier. nbc currently uses Vyvx services to backhaul news, sports, and special event programming to its production centers in New York, New Jersey, and North Carolina. Vyvx has an 11,000-mi fiber-optic network that serves 65 major markets, with direct connection to approximately 50 sports venues and 50 independent teleproduction studios.