YD/T 5176-2009.Acceptance Specification for Local Optical Fiber Cable Network of Wavelength Division Multiplexing System. 1总则 1.0.1YD/T 5176是本地网光缆波 分复

YD 5177-2009.Provisional Specification of Design for Internet Network Security. 1.总则 1.0.1YD 5177规定适用于新建互联网网络安全工程设计,改扩建工程应在合理利用原有系统的基础上参照执行。 1.0.2互联网网

YD/T 1686-2007.Speech Quality and Transmission Performance Requirements and Testing Methods for IP Telephony Terminal Equipment. 1范围 YD/T 1686规定了IP电话终

YD/T 1684-2007.Technical Requirements and Testing Methods for the Billing of the Digital Cellular Mobile Telecommunication Network Point to Point Shor

YD/T 1683-2007.Testing Methods for CDMA Digital Cellular Mobile Communication Network ME-UIM Card Interface. 1范围 YD/T 1683规定了CDMA数字蜂窝移动通信网移动设备(ME)与用户识

YD/T 1682-2007.Testing Methods for CDMA Digital Cellular Mobile Communication Network User Identity Model(UIM). 1范围 YD/T 1682规定了CDMA数字蜂窝移动通信网用户识别模块(UI

YD/T 1681-2007.Technical Requirements for 2GHz cdma2000 Digital Cellular MobileCommunication Networks:High Rate Packet Data(HRPD) (Phase II) Air Inter

YD/T 1669-2007.The Off-Grid Wind/PV Hybrid Power Supply System for Telecommunications. 1范围 YD/T 1669规定了离网型通信用风/光互补供电系统(以下简称为系统)的定义、分类、要求、试验方法、检验规则、标志、

YD/T 1668-2007.Technical Specification for STM-64 optical fiber line system. 1范围 YD/T 1668规定了线路速率为9953 280 kbits的SDH STM-64光缆线路系统的技术要求。 YD/T 1668适用于公用

YD/T 1666-2007.Technical Specification for Long Distance Remote Visual Surveillance System Security. 1范围 YD/T 1666规定了基于IP网络的前端监控设备、监控管理平台、监控中心和远程监控客户端