YD/T 841.4-2016.Plastic duct for telecommunication underground conduit Part 4: Silicore plastic duct.1范围YD/T 841.4规定了地下通信管道用高密度聚乙烯硅芯管(以下简...
YD/T 627-2012.Parameters,transmission characteristics and test methods of the digital relay interface (2048kbit/s) for digital switch.1范围YD/T 627规定了数字交换机进入通信...
YD/T 640-2012.General requirements and test methods for radio-frequency connectors of telecommunication equipment.1范围YD/T 640规定了通信设备用射频连接器的技术要求...
YD/T 809-1996.1范围YD/T 809规定了邮资信封的定义、品种规格、技术要求、试验方法、检验规则和包装、标志、贮存。YD/T 809适用于邮政通信用的...
YD/T 810-1996.1范围YD/T 810规定了首日封的定义、品种规格、技术要求、试验方法、检验规则和包装、标志、贮存。YD/T 810适用于通过邮政部门寄...
YD/T 839.1-2015.Filling compounds and flooding compounds for telecommunication cable and optical fibre cable Part 1: Test methods.1范围YD/T 839.1规定了通信电缆光缆用填充...
YD 5218-2015.Provisional Supervision Specifications for Broadband Optical Fiber Access Eqpuipment Installation Engincering.1总则1.0.1 为规范宽带光纤接入工程施工监理工...
YD 5221-2015.Provisional Regulations for Dismantling Safety of Telecommunication Facilities.1总则1.0.1为了在通信设施拆除施工中贯彻执行国家安全生产法律和法规...
YDN 119.3-1999.1范围YDN 119.3规范规定了业务管理点(SMP)设备的测试要求,适用于对国际、国内、省内、本地智能网中引用的业务管理点进行测试。...
YDN 2248-2011.Technical standard of information security management system for Internet data center.1范围YDN 2248规定规定了互联网数据中心信息安全管理系统的主要...
