ISO/IEC 13872:1995 Information technology — Telecommunications and information exchange between systems — Private Integrated Services Network — Specification, functional model and information flows — Call diversion supp
2003ISO/IEC 13872:2003 Information technology - Telecommunications and information exchange between systems - Private Integrated Services Network; Specification, functional model and information flows; Call diversion supplementary services
1995ISO/IEC 13872:1995 Information technology — Telecommunications and information exchange between systems — Private Integrated Services Network — Specification, functional model and information flows — Call diversion supp