Information technology - Business Operational View - Part 20: Linking business operational view to functional service view (Adopted ISO/IEC 15944-20:2015, first edition, 2015-12-15)
Edition 2016-12-01

Information Technology - Telecommunications and Information Exchange Between Systems - Private Integrated Services Network - Specification, Functional Model and Information Flows - 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 - Private User Mobility (PUM) - Registration Supplementary Service
Edition 2004-12-01

Information Technology - Telecommunications and Information Exchange Between Systems - Private Integrated Services Network - Specification, Functional Model and Information Flows - Private User Mobility (PUM) - Call Handling Additional Network Features
Edition 2004-12-01

Information Technology - Telecommunications and Information Exchange Between Systems - Broadband Private Integrated Services Network - Inter-Exchange Signalling Protocol - Generic Functional Protocol
Edition 2004-01-01

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

Software and systems engineering - Software measurement - IFPUG functional size measurement method 2009
Edition 2010-12-01

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

Information Technology - Telecommunications and Information Exchange Between Systems - Corporate Telecommunication Networks - Signalling Interworking Between QSIG and H.323 - Generic Functional Protocol for the Support of Supplementary Services
Edition 2004-01-01

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