Information Technology - Telecommunications and Information Exchange Between Systems - Private Integrated Services Network - Inter-Exchange Signalling Protocol - Call Priority Interruption and Call Priority Interruption Protection Supplementary Services
Edition 2004-12-01

Information technology - Telecommunications and information exchange between systems - Private Integrated Services Network - Specification, functional model and information flows - Call completion supplementary services
Edition 1997-02-28

Information Technology - Telecommunications and Information Exchange Between Systems - Private Integrated Services Network - Inter-Exchange Signalling Protocol - Call Diversion Supplementary Services
Edition 2004-01-01

Information Technology - Telecommunications and Information Exchange Between Systems - Private Integrated Services Network - Inter-Exchange Signalling Protocol - Call Transfer Supplementary Service
Edition 2004-01-01

Information Technology - Telecommunications and Information Exchange Between Systems - Private Integrated Services Network - Inter-Exchange Signalling Protocol - Call Completion Supplementary Services
Edition 2004-12-01

Information Technology - Telecommunications and Information Exchange Between Systems - Private Integrated Services Network - Specification, Functional Model and Information Flows - Call Diversion Supplementary Services
Edition 2004-12-01

Information Technology - Telecommunications and Information Exchange Between Systems - Private Integrated Services Network - Specification, Functional Model and Information Flows - Call Transfer Supplementary Service
Edition 2004-12-01

Information Technology - Telecommunications and Information Exchange Between Systems - Private Integrated Services Network - Inter-Exchange Signalling Protocol - Call Offer Supplementary Service
Edition 2004-12-01

Information Technology - Telecommunications and Information Exchange Between Systems - Private Integrated Services Network - Inter-Exchange Signalling Protocol - Call Intrusion Supplementary Service
Edition 2004-12-01

Information Technology - Telecommunications and Information Exchange Between Systems - Corporate Telecommunication Networks - Signalling Interworking Between QSIG and H.323 - Call Transfer Supplementary Services
Edition 2004-01-01