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    CSA ISO/IEC 15505:04 (R2019)

    Information Technology - Telecommunications and Information Exchange Between Systems - Private Integrated Services Network - Specification, Functional Model and Information Flows - Message Waiting Indication Supplementary Service (Adopted ISO/IEC 15505:2003, third edition, 2003-04-01)

    • English
    • Publication Year 2004
    • Published by CSA Group
    • Reaffirmed in 2019

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