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    I.S. EN 61643-351:2017

    COMPONENTS FOR LOW-VOLTAGE SURGE PROTECTIVE DEVICES - PART 351: PERFORMANCE REQUIREMENTS AND TEST METHODS FOR TELECOMMUNICATIONS AND SIGNALLING NETWORK SURGE ISOLATION TRANSFORMERS (SIT)

    National Standards Authority of Ireland

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    BS EN 50173-5 : 2018

    Information technology. Generic cabling systems. Data centre spaces

    British Standards Institution

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    BS EN IEC 61643-352 : 2018

    COMPONENTS FOR LOW-VOLTAGE SURGE PROTECTION - PART 352: SELECTION AND APPLICATION PRINCIPLES FOR TELECOMMUNICATIONS AND SIGNALLING NETWORK SURGE ISOLATION TRANSFORMERS (SITS) (IEC 61643-352:2018)

    British Standards Institution

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    I.S. ETS 300 118:1991

    ATTACHMENTS TO THE PUBLIC SWITCHED TELEPHONE NETWORK (PSTN) CATEGORY 2 ATTACHMENT REQUIREMENTS FOR 1200 BITS PER SECOND HALF DUPLEX AND 1200/75 PER SECOND ASYMMETRICAL DUPLEX MODEMS STANDARDIZED FOR USE ON THE PSTN

    National Standards Authority of Ireland

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    I.S. ETS 300 123:1991

    ATTACHMENT REQUIREMENTS FOR DATA TERMINAL EQUIPMENT (DTE) TO CONNECT TO PACKET SWITCHED PUBLIC DATA NETWORKS (PSPDN) USING CCITT RECOMMENDATIONS X.25 (1984) INTERFACE REQUIREMENTS APPLICABLE TO DTES SUBSCRIBING TO LINK ACCESS PROCEDURE BALANCED (LAPB) EXTENDED (MODULO 128) OPERATION

    National Standards Authority of Ireland

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    I.S. EN 61643-311:2013

    COMPONENTS FOR LOW-VOLTAGE SURGE PROTECTIVE DEVICES - PART 311: PERFORMANCE REQUIREMENTS AND TEST CIRCUITS FOR GAS DISCHARGE TUBES (GDT) (IEC 61643-311:2013 (EQV))

    National Standards Authority of Ireland

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    I.S. EN 61643-312:2013

    COMPONENTS FOR LOW-VOLTAGE SURGE PROTECTIVE DEVICES - PART 312: SELECTION AND APPLICATION PRINCIPLES FOR GAS DISCHARGE TUBES (IEC 61643-312:2013 (EQV) + CORRIGENDUM JUL. 2013 (EQV))

    National Standards Authority of Ireland

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    BS EN 61643-351 : 2017

    COMPONENTS FOR LOW-VOLTAGE SURGE PROTECTIVE DEVICES - PART 351: PERFORMANCE REQUIREMENTS AND TEST METHODS FOR TELECOMMUNICATIONS AND SIGNALLING NETWORK SURGE ISOLATION TRANSFORMERS (SIT)

    British Standards Institution

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    BS EN 61643-312 : 2013

    COMPONENTS FOR LOW-VOLTAGE SURGE PROTECTIVE DEVICES - PART 312: SELECTION AND APPLICATION PRINCIPLES FOR GAS DISCHARGE TUBES

    British Standards Institution

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    BS EN 61643-311 : 2013

    COMPONENTS FOR LOW-VOLTAGE SURGE PROTECTIVE DEVICES - PART 311: PERFORMANCE REQUIREMENTS AND TEST CIRCUITS FOR GAS DISCHARGE TUBES (GDT)

    British Standards Institution

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