标准摘要
Is one of a series of standards defining services and signalling protocols applicable to Private Services Networks (PISN). The Series uses ISDN concepts as developed by ITU-T and conforms to the framework of Standards for Open Systems Interconnections as defined by ISO/IEC. Specifies the the Call Completion supplementary service.
英文名称Information technology - Telecommunications and information exchange between systems - Private Integrated Services Network - Inter-exchange signalling protocol - Call completion supplementary services