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    ITU R S 1150 : 1995

    TECHNICAL CRITERIA TO BE USED IN EXAMINATIONS RELATING TO THE PROBABILITY OF HARMFUL INTERFERENCE BETWEEN FREQUENCY ASSIGNMENTS IN THE FSS AS REQUIRED IN NO 1506 OF THE RADIO REGULATIONS

    International Telecommunications Union (CCIR) and (CCITT)

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    ITU V.26 : 1988

    2400 BITS PER SECOND MODEM STANDARDIZED FOR USE ON 4-WIRE LEASED TELEPHONE-TYPE CIRCUITS

    International Telecommunications Union (CCIR) and (CCITT)

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    ITU R BS 1873 : 2010

    SERIAL MULTICHANNEL AUDIO DIGITAL INTERFACE FOR BROADCASTING STUDIOS

    International Telecommunications Union (CCIR) and (CCITT)

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    ITU Q.86.2 : 1995

    ADVICE OF CHARGE (AOC)

    International Telecommunications Union (CCIR) and (CCITT)

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    ITU L.11 : 1988

    JOINT USE OF TUNNELS BY PIPELINES AND TELECOMMUNICATION CABLES, AND THE STANDARDIZATION OF UNDERGROUND DUCT PLANS

    International Telecommunications Union (CCIR) and (CCITT)

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    ITU V.31 : 1988

    ELECTRICAL CHARACTERISTICS FOR SINGLE-CURRENT INTERCHANGE CIRCUITS CONTROLLED BY CONTACT CLOSURE

    International Telecommunications Union (CCIR) and (CCITT)

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    ITU P.63 : 1988

    METHODS FOR THE EVALUATION OF TRANSMISSION QUALITY ON THE BASIS OF OBJECTIVE MEASUREMENTS

    International Telecommunications Union (CCIR) and (CCITT)

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    ITU Q.932 : 98 AMD 1 2000

    DIGITAL SUBSCRIBER SIGNALLING SYSTEM No. 1 - GENERIC PROCEDURES FOR THE CONTROL OF ISDN SUPPLEMENTARY SERVICES

    International Telecommunications Union (CCIR) and (CCITT)

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    ITU Q.468 : 1988

    ROUTING AND NUMBERING FOR INTERNATIONAL WORKING - TERMINATION OF INTERREGISTER SIGNALLING

    International Telecommunications Union (CCIR) and (CCITT)

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    ITU Q.698 : 1993

    INTERWORKING OF SIGNALLING SYSTEM NO. 7 ISUP, TUP AND SIGNALLING SYSTEM NO. 6 USING ARROW DIAGRAMS

    International Telecommunications Union (CCIR) and (CCITT)