ITU-T K.21-2011 客户端电信交换设备的过电压和过电流抗力
This Recommendation specifies resistibility requirements and test procedures for telecommunication equipment which is attached to or installed within
Resistibility of telecommunication equipment installed in customer premises to overvoltages and overcurrents Study Group 5
YD/T 950-1998 电信交换设备过电压过电流防护技术要求及试验方法
本标准规定了电信交换设备过电压过电流防护技术要求及试验方法。 本标准适用于局用交换设备、用户交换设备和接人网设备过电压过电流防护性能的检验。其他话务量较集中的设备(如中继线或多通道电路等).也可参照使用
Technical requirements and test methods for protection against overvoltages and overcurrents on telecommunication switching equipment
DS 5009.09:1984 图上的图形符号．第9部分：电信．交换设备和外围设备
Denne standard indeholder grafiske symboler til brug p? skemaer inden for omr?det telekommunikati-on. Symbolerne omfatter koblingssystemer, telefon
Graphical symbols for diagrams. Part 9: Telecommunications 1. Switching and peripheral equipment
ITU-T K.20-2003 电信交换设备耐过电压和过电流的能力 系列K:抗干扰防护(研究组5). 封面说明20040116
This Recommendation specifies resistibility requirements and test procedures for telecommunication equipment which is installed in a Telecommunication
Resistibility of telecommunication equipment installed in a telecommunications centre to overvoltages and overcurrents SERIES K: PROTECTION AGAINST INTERFERENCE Study Group 5; Cover Note: January 16, 2004
ITU-T K.21-2003 电信交换设备耐过电压和过电流的能力 系列K:抗干扰防护(研究组5). 封面说明20040116
This Recommendation specifies resistibility requirements and test procedures for telecommunication equipment which is installed in or on a customer
Resistibility of telecommunication equipment installed in customer premises to overvoltages and overcurrents SERIES K: PROTECTION AGAINST INTERFERENCE Study Group 5; Covering Note: January 16, 2004
ITU-T K.21-2019 电信交换设备耐过电压和过电流的能力 系列K:抗干扰防护(研究组5). 封面说明20040116
This Recommendation specifies resistibility requirements and test procedures for telecommunication equipment which is installed in or on a customer
Resistibility of telecommunication equipment installed in customer premises to overvoltages and overcurrents SERIES K: PROTECTION AGAINST INTERFERENCE Study Group 5; Covering Note: January 16, 2004
ITU-T K.20 AMD 1-2004 电信交换设备耐过电压和过电流的能力 修正案1 新附件I-连接到外部对称线对电缆的接口的不固定的横向电
A network operator replaced earlier concentrators with a new type of access nodes in 1999-2000
Resistibility of telecommunication equipment installed in a telecommunications centre to overvoltages and overcurrents Amendment 1: New Appendix I ?Floating transverse power induction and earth potential rise test for ports connected to external symmetri
CNS 13802-9-1997 电机工程制图符号(电信：交换及接口设备)
Graphical symbols for diagrams (Telecommunication:Switching and peripheral equipment)
CNS 13802.9-1997 电机工程制图符号（电信：交换及接口设备）
Graphical symbols for diagrams (Telecommunication:Switching and peripheral equipment)
SIS OVERSIKT ITS 3-1992 电信设备．专用交换机（PBXs）
?versikten omfattar standarder inneh?llande tekniska krav p? abonnentv?xlar f?r anslutning till det allm?nna telen?tet.De i denna ?versikt refererade
SIS FASTSTALLER OCH UTGER SVENSK STANDARD SAMT SALJER NATIONELLA OCH INTERN ATI ON ELLA ST AN D ARD PU BL I K AT 10 N E R
YDJ 41-1986 长途通信电话交换设备安装工程施工及验收技术规范
Technical specifications for Installation engineering construction and acceptance of long-distance communication telephone exchange equipment
KS X IEC 60617-9:2001 制图用图形符号.第9部分:电信、交换和外围设备
Graphical symbols for diagrams-Part 9:Telecommunications:Switching and peripheral equipment
KS X IEC 60617-9:2013 制图用图形符号 第9部分：电信、交换和外围设备
Graphical symbols for diagrams－Part 9：Telecommunications：Switching and peripheral equipment
KS X IEC 60617-9-2001(2011 图表用图形符号第9部分:电信:交换和外围设备
Graphical symbols for diagrams－Part 9：Telecommunications：Switching and peripheral equipment
BS EN 60617-9:1996(1998)*IEC 617-9:1996 图表的图形符号 - 第9部分：电信：交换和外围设备
Graphical symbols for diagrams — Part 9 : Telecommunications : switching and peripheral equipment
ITU-T K.21-2011 客户端电信交换设备的过电压和过电流抗力
This Recommendation specifies resistibility requirements and test procedures for telecommunication equipment which is attached to or installed within
Resistibility of telecommunication equipment installed in customer premises to overvoltages and overcurrents Study Group 5
YD/T 950-1998 电信交换设备过电压过电流防护技术要求及试验方法
本标准规定了电信交换设备过电压过电流防护技术要求及试验方法。 本标准适用于局用交换设备、用户交换设备和接人网设备过电压过电流防护性能的检验。其他话务量较集中的设备(如中继线或多通道电路等).也可参照使用
Technical requirements and test methods for protection against overvoltages and overcurrents on telecommunication switching equipment
DS 5009.09:1984 图上的图形符号．第9部分：电信．交换设备和外围设备
Denne standard indeholder grafiske symboler til brug p? skemaer inden for omr?det telekommunikati-on. Symbolerne omfatter koblingssystemer, telefon
Graphical symbols for diagrams. Part 9: Telecommunications 1. Switching and peripheral equipment
ITU-T K.20-2003 电信交换设备耐过电压和过电流的能力 系列K:抗干扰防护(研究组5). 封面说明20040116
This Recommendation specifies resistibility requirements and test procedures for telecommunication equipment which is installed in a Telecommunication
Resistibility of telecommunication equipment installed in a telecommunications centre to overvoltages and overcurrents SERIES K: PROTECTION AGAINST INTERFERENCE Study Group 5; Cover Note: January 16, 2004
ITU-T K.21-2003 电信交换设备耐过电压和过电流的能力 系列K:抗干扰防护(研究组5). 封面说明20040116
This Recommendation specifies resistibility requirements and test procedures for telecommunication equipment which is installed in or on a customer
Resistibility of telecommunication equipment installed in customer premises to overvoltages and overcurrents SERIES K: PROTECTION AGAINST INTERFERENCE Study Group 5; Covering Note: January 16, 2004
ITU-T K.21-2019 电信交换设备耐过电压和过电流的能力 系列K:抗干扰防护(研究组5). 封面说明20040116
This Recommendation specifies resistibility requirements and test procedures for telecommunication equipment which is installed in or on a customer
Resistibility of telecommunication equipment installed in customer premises to overvoltages and overcurrents SERIES K: PROTECTION AGAINST INTERFERENCE Study Group 5; Covering Note: January 16, 2004
ITU-T K.20 AMD 1-2004 电信交换设备耐过电压和过电流的能力 修正案1 新附件I-连接到外部对称线对电缆的接口的不固定的横向电
A network operator replaced earlier concentrators with a new type of access nodes in 1999-2000
Resistibility of telecommunication equipment installed in a telecommunications centre to overvoltages and overcurrents Amendment 1: New Appendix I ?Floating transverse power induction and earth potential rise test for ports connected to external symmetri
CNS 13802-9-1997 电机工程制图符号(电信：交换及接口设备)
Graphical symbols for diagrams (Telecommunication:Switching and peripheral equipment)
CNS 13802.9-1997 电机工程制图符号（电信：交换及接口设备）
Graphical symbols for diagrams (Telecommunication:Switching and peripheral equipment)
SIS OVERSIKT ITS 3-1992 电信设备．专用交换机（PBXs）
?versikten omfattar standarder inneh?llande tekniska krav p? abonnentv?xlar f?r anslutning till det allm?nna telen?tet.De i denna ?versikt refererade
SIS FASTSTALLER OCH UTGER SVENSK STANDARD SAMT SALJER NATIONELLA OCH INTERN ATI ON ELLA ST AN D ARD PU BL I K AT 10 N E R
YDJ 41-1986 长途通信电话交换设备安装工程施工及验收技术规范
Technical specifications for Installation engineering construction and acceptance of long-distance communication telephone exchange equipment
KS X IEC 60617-9:2001 制图用图形符号.第9部分:电信、交换和外围设备
Graphical symbols for diagrams-Part 9:Telecommunications:Switching and peripheral equipment
KS X IEC 60617-9:2013 制图用图形符号 第9部分：电信、交换和外围设备
Graphical symbols for diagrams－Part 9：Telecommunications：Switching and peripheral equipment
KS X IEC 60617-9-2001(2011 图表用图形符号第9部分:电信:交换和外围设备
Graphical symbols for diagrams－Part 9：Telecommunications：Switching and peripheral equipment
BS EN 60617-9:1996(1998)*IEC 617-9:1996 图表的图形符号 - 第9部分：电信：交换和外围设备
Graphical symbols for diagrams — Part 9 : Telecommunications : switching and peripheral equipment
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