CAN/CSA-ISO/IEC 21407:04 (R2022) :
Information technology - Telecommunications and information exchange between systems - Private Integrated Services Network - Specification, functional model and information flows - Simple dialog supplementary service (Adopted ISO/IEC 21407:2001, first edition, 2001-08-15)
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Information technology - Telecommunications and information exchange between systems - Private Integrated Services Network - Specification, functional model and information flows - Simple dialog supplementary service (Adopted ISO/IEC 21407:2001, first edition, 2001-08-15)
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