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Information technology Telecommunications and information exchange between systems Private Integrated Services Network Inter-exchange signalling protocol Message Waiting Indication supplementary service

Information technology Telecommunications and information exchange between systems Private Integrated Services Network Inter-exchange signalling protocol PINX clock synchronization

Information technology Telecommunications and information exchange between systems Private Integrated Services Network Specification, functional model and information flows Common information additional network feature

Information technology Telecommunications and information exchange between systems Private Integrated Services Network Inter-exchange signalling protocol Common Information additional network feature

Information technology Telecommunications and information exchange between systems Broadband Private Integrated Services Network Inter-exchange signalling protocol Transit counter additional network feature

Information technology Telecommunications and information exchange between systems Local and metropolitan area networks Common specifications

Information technology Telecommunications and information exchange between systems Local and metropolitan area networks Common specifications

Information technology Telecommunications and information exchange between systems Broadband Private Integrated Services Network Service description Broadband connection oriented bearer services

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

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

Information technology Telecommunications and information exchange between systems Next Generation Corporate Networks (NGCN) Emergency calls

Information technology Telecommunications and information exchange between systems proxZzzy for sleeping hosts