Information Technology - Telecommunications and Information Exchange Between Systems - Private Integrated Services Network - Inter-Exchange Signalling Protocol - Do Not Disturb and Do Not Disturb Override Supplementary Services
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 - Private Integrated Services Network - Specification, Functional Model and Information Flows - Advice of Charge Supplementary Services
Edition 2001-03-01

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

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

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

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

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

Information Technology - Telecommunications and Information Exchange Between Systems - Private Integrated Services Network - Specification, Functional Model and Information Flows - Transit Counter Additional Network Feature
Edition 2001-03-01

Information Technology - Telecommunications and Information Exchange Between Systems - Private Integrated Services Network - Inter-Exchange Signalling Protocol - Transit Counter Additional Network Feature
Edition 2002-03-01