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    ITU R BT 500 : 2012

    METHODOLOGY FOR THE SUBJECTIVE ASSESSMENT OF THE QUALITY OF TELEVISION PICTURES

    International Telecommunications Union (CCIR) and (CCITT)

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    ITU Q.2150.0 : 2001

    GENERIC SIGNALLING TRANSPORT SERVICE

    International Telecommunications Union (CCIR) and (CCITT)

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    ITU X.835 : 1996

    INFORMATION TECHNOLOGY - OPEN SYSTEMS INTERCONNECTION - GENERIC UPPER LAYERS SECURITY: PROTECTING TRANSFER SYNTAX PROTOCOL IMPLEMENTATION CONFORMANCE STATEMENT (PICS) PROFORMA

    International Telecommunications Union (CCIR) and (CCITT)

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    ITU R SM 1046 : 2017

    DEFINITION OF SPECTRUM USE AND EFFICIENCY OF A RADIO SYSTEM

    International Telecommunications Union (CCIR) and (CCITT)

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    ITU L.3 : 1988

    ARMOURING OF CABLES

    International Telecommunications Union (CCIR) and (CCITT)

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    ITU I.335 : LATEST

    ISDN ROUTING PRINCIPLES

    International Telecommunications Union (CCIR) and (CCITT)

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    ITU M.4100 : 1996

    MAINTENANCE OF COMMON CHANNEL SIGNALLING SYSTEM NO.7

    International Telecommunications Union (CCIR) and (CCITT)

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    ITU Y.1544 : 2008

    MULTICAST IP PERFORMANCE PARAMETERS

    International Telecommunications Union (CCIR) and (CCITT)

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    ITU I.259.1 : 1996

    SCREENING SUPPLEMENTARY SERVICES: ADDRESS SCREENING (ADS)

    International Telecommunications Union (CCIR) and (CCITT)

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    ITU R SM 331 : 1978

    NOISE AND SENSITIVITY OF RECEIVERS

    International Telecommunications Union (CCIR) and (CCITT)