DESC: OCU 45 offers transparent transport of T3/E3/STS-1 services over a fiber transport, at distances up to 40 km. The OCU 45 is available in single-mode and multi-mode versions. Measuring only one rack unit high, the OCU 45 can be used standalone, wallmounted or mounted in 19-inch or 23-inch racks using an optional mounting tray. This compact device gives NSPs a convenient way to extend T3/E3/ STS-1 services from their point-of-presence to their customer and provides enterprise users a powerful tool for extending T3/E3/STS-1 services over fiber in a campus environment.