ETSI ETS 300 300-1995 Broadband Integrated Services Digital Network (B-ISDN); Synchronous Digital Hierarchy (SDH) Based User Network Access Physical Layer Interfaces for B-ISDN Applications
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
1995ETSI ETS 300 300-1995 Broadband Integrated Services Digital Network (B-ISDN); Synchronous Digital Hierarchy (SDH) Based User Network Access Physical Layer Interfaces for B-ISDN Applications