Integrated Services Digital Network (ISDN); user-network interface data link layer specification; application of CCITT recommendations Q.920/I.440 and Q.921/I.441; english version ETS 300125:1991
Digital Enhanced Cordless Telecommunications (DECT) - Integrated Services Digital Network (ISDN) - DECT/ISDN interworking for intermediate system configuration - Interworking and profile specification
