KS X ISO/IEC 20161-2014(2019) Information technology — Telecommunications and information exchange between systems — Private Integrated Services Network — Use of QSIG at the C reference point between a PINX and an Interconnecting
2014KS X ISO/IEC 20161:2014 Information technology — Telecommunications and information exchange between systems — Private Integrated Services Network — Use of QSIG at the C reference point between a PINX and an Interconnecting Network
2004KS X ISO/IEC 20161:2004 Information technology-Telecommunications and information exchange between systems-Private Integrated Services Network-Use of QSIG at the C reference point between a PINX and an Interconnecting Network