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    • Telephone networks
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    ISO/IEC 21991 : 2002(R2007)

    INFORMATION TECHNOLOGY - TELECOMMUNICATIONS AND INFORMATION EXCHANGE BETWEEN SYSTEMS - CORPORATE TELECOMMUNICATION NETWORKS - SIGNALLING INTERWORKING BETWEEN QSIG AND H.323 - CALL COMPLETION SUPPLEMENTARY SERVICES

    International Organization for Standardization

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    ISO/IEC 21989 : 2002(R2015)

    INFORMATION TECHNOLOGY - TELECOMMUNICATIONS AND INFORMATION EXCHANGE BETWEEN SYSTEMS - PRIVATE INTEGRATED SERVICES NETWORK - SPECIFICATION, FUNCTIONAL MODEL AND INFORMATION FLOWS - SHORT MESSAGE SERVICE

    International Organization for Standardization

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    ISO/IEC 21990 : 2002(R 2015)

    INFORMATION TECHNOLOGY - TELECOMMUNICATIONS AND INFORMATION EXCHANGE BETWEEN SYSTEMS - PRIVATE INTEGRATED SERVICES NETWORK - INTER-EXCHANGE SIGNALLING PROTOCOL - SHORT MESSAGE SERVICE

    International Organization for Standardization

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    ISO/IEC 19459 : 2001(R2006)

    INFORMATION TECHNOLOGY - TELECOMMUNICATIONS AND INFORMATION EXCHANGE BETWEEN SYSTEMS - PRIVATE INTEGRATED SERVICES NETWORK - SPECIFICATION, FUNCTIONAL MODEL AND INFORMATION FLOWS - SINGLE STEP CALL TRANSFER SUPPLEMENTARY SERVICE

    International Organization for Standardization

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    ISO/IEC 21410 : 2001(R2006)

    INFORMATION TECHNOLOGY - TELECOMMUNICATIONS AND INFORMATION EXCHANGE BETWEEN SYSTEMS - CORPORATE TELECOMMUNICATION NETWORKS - SIGNALLING INTERWORKING BETWEEN QSIG AND H.323 - CALL TRANSFER SUPPLEMENTARY SERVICES

    International Organization for Standardization

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    ISO/IEC 21889 : 2001(R2006)

    INFORMATION TECHNOLOGY - TELECOMMUNICATIONS AND INFORMATION EXCHANGE BETWEEN SYSTEMS - PRIVATE INTEGRATED SERVICES NETWORK - INTER-EXCHANGE SIGNALLING PROTOCOL - CALL IDENTIFICATION AND CALL LINKAGE ADDITIONAL NETWORK FEATURE

    International Organization for Standardization

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    ISO/IEC 21888 : 2001(R2006)

    INFORMATION TECHNOLOGY - TELECOMMUNICATIONS AND INFORMATION EXCHANGE BETWEEN SYSTEMS - PRIVATE INTEGRATED SERVICES NETWORK - SPECIFICATION, FUNCTIONAL MODEL AND INFORMATION FLOWS - CALL IDENTIFICATION AND CALL LINKAGE ADDITIONAL NETWORK FEATURE

    International Organization for Standardization

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    ISO/IEC 21409 : 2001R(2006)

    INFORMATION TECHNOLOGY - TELECOMMUNICATIONS AND INFORMATION EXCHANGE BETWEEN SYSTEMS - CORPORATE TELECOMMUNICATION NETWORKS - SIGNALLING INTERWORKING BETWEEN QSIG AND H.323 - GENERIC FUNCTIONAL PROTOCOL FOR THE SUPPORT OF SUPPLEMENTARY SERVICES

    International Organization for Standardization

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    ISO/IEC 21411 : 2001(R2006)

    INFORMATION TECHNOLOGY - TELECOMMUNICATIONS AND INFORMATION EXCHANGE BETWEEN SYSTEMS - CORPORATE TELECOMMUNICATION NETWORKS - SIGNALLING INTERWORKING BETWEEN QSIG AND H.323 - CALL DIVERSION SUPPLEMENTARY SERVICES

    International Organization for Standardization

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    ISO/IEC 21407 : 2001(R2006)

    INFORMATION TECHNOLOGY - TELECOMMUNICATIONS AND INFORMATION EXCHANGE BETWEEN SYSTEMS - PRIVATE INTEGRATED SERVICES NETWORK - SPECIFICATION, FUNCTIONAL MODEL AND INFORMATION FLOWS - SIMPLE DIALOG SUPPLEMENTARY SERVICE

    International Organization for Standardization

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