The ADTRAN 1200663L1 OSU 300 is a three-slot, DC-powered Optical Service Unit delivered with no line cards installed. It uses single-mode fiber with SC connectors and supports DS3 service termination within the modular OSU 300 chassis, with additional interface cards available for expansion. As the base hardware for ADTRAN’s OSU 300 family, it provides SMF-compatible optical termination suitable for telecom environments that require DC power and modular expansion. Because it ships without cards, installation of the appropriate ADTRAN interface cards is required to implement the desired data interfaces and DS3 communications.
