Information technology - Telecommunications and information exchange between systems - Private integrated services network - Part 1: Reference configuration for PISN exchanges (PINX)— 14 стр.
Integrated Services Digital Network (ISDN); Calling Line Identification Presentation (CLIP) supplementary service; service description; english version ETS 300089:1992
Integrated Services Digital Network (ISDN); Connected Line Identification Presentation (COLP) supplementary service; service description; english version ETS 300094:1992
