ISO/IEC 21991
Information technology; Telecommunications and information exchange between systems - Corporate telecommunication networks - Signalling interworking between QSIG and H.323; Call completion supplementary services
Informationstechnik - Telekommunikation und Informationsaustausch zwischen Systemen - Firmentelekommunikationsnetze, Zeichengabe-Zusammenwirken zwischen QSIG und H.323; Dienstemerkmale "Rückruf"
Responsible national committee
NA 043-04-17 AA - Cards and security devices for personal identification
Responsible international committee
ISO/IEC JTC 1/SC 6 - Telecommunications and information exchange between systems