Deterioration of the Kennedy Space Center Launch Processing System copper data bus cables over time, combined with the unavailability of replacement cabling and the transmission distances of 10 kilometers, resulted in the decision to replace the copper cable system with a fiber optic version. The replacement system is referred to as the Digital Fiber Optic Transmission Equipment. The distinguishing aspect of the digital Fiber Optic Transmission Equipment is the use of Wavelength Division Multiplexing fiber optic technology. This design allows the transmission of digital bipolar data on a single fiber optic cable. This paper describes the system requirements and design characteristics of Digital Fiber Optic Transmission Equipment using Wavelength Division Multiplexing technology for the transmission of digital bipolar data on a single fiber optic cable
