CSN ETS 300 232-1994 Transmission and Multiplexing (TM). Optical interface for equipments and systems relating to the Synchronous Digital Hierarchy (ITU-T Recommendation G.957:1993 modified)
1994CSN ETS 300 232-1994 Transmission and Multiplexing (TM). Optical interface for equipments and systems relating to the Synchronous Digital Hierarchy (ITU-T Recommendation G.957:1993 modified)