CSA ISO/IEC 15049:01 (R2019) : Information Technology - Telecommunications and Information Exchange Between Systems - Private Integrated Services Network - Specification, Functional Model and Information Flows - Advice of Charge Supplementary Services (Adopted ISO/IEC 15049:1997, first edition, 1997-05-15)

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    CSA ISO/IEC 15049:01 (R2019)

    Information Technology - Telecommunications and Information Exchange Between Systems - Private Integrated Services Network - Specification, Functional Model and Information Flows - Advice of Charge Supplementary Services (Adopted ISO/IEC 15049:1997, first edition, 1997-05-15)

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