1997ETSI ETS 300 300-1997 Broadband Integrated Services Digital Network (B-ISDN); Synchronous Digital Hierarchy (SDH) Based User Network Access; Physical Layer User Network Interfaces (UNI) for 155 520 kbit/s and 622 080 kbit/s Asynchronous Transfer Mode (ATM) B-ISDN Applications
1996ETSI PRETS 300 300-1996 Transmission and Multiplexing (TM); Synchronous Digital Hierarchy (SDH); SHD Based User Network Access; Physical Layer Interfaces for Broadband Integrated Services Digital Network (B-ISDN) Applications Second Edition
1994ETSI PRETS 300 300-1994 Broadband Integrated Services Digital Network (B-ISDN); Synchronous Digital Hierarchy (SDH) Based User Network Access Physical Layer Interfaces for B-ISDN Applications
1993ETSI PRETS 300 300-1993 Network Aspects (NA); SDH Based User Network Access Physical Layer Interfaces for B-ISDN Applications