YDC 003-2001.General Technical Requirements for Softwsitch.1范围YDC 003性技术文件规定了软交换在网络中的位置、网络框架结构、功能、通信接口、协议及...
YDC 004-2002.Technical Specification of SPC for Fixed Telephone Subscribers to Select different long distance Networks.1范围YDC 004规定了为支持用户选择不同运营商长途...
YD/T 5138-2005.Acceptance Specifications for Local Communication Line Project.1总则1.0.1 YD/T 5138适用于本地的中继和接人线路的新建工程,扩建、改建及其他通信...
YD/T 5144-2007.Provisional Specifications of Engineering Design for Automatically Switched Optical Network.1总则1.0.1 YD/T 5144适用于新建自动交换光网络的工程设计,改...
YD 5148-2007.Design Specifications for Pole Line of Optical(Copper) Cable Communication Engineering.1总则1.0.1YD 5148适用于新建长途和本地通信架空光(电)缆线路工程...
YD/T 5151-2007.Design Specification of Optical Fiber Cable in the Leading in Room.1总则1.0.1YD/T 5151适用于新建通信机房光缆进线室工程设计。改、扩建工程可参...
YD/T 5152-2007.Acceptance Specification of Optical Fiber Cable in the Leading in Room.1总则1.0.1YD/T 5152是新建通信机房光缆进线室土建工艺、铁架安装施工质量检...
YD 5137-2005.Designing Specification For Local Communication Line Engineering.1总则1.0.1《本地通信线路工程设计规范》(简称本规范)适用于本地的中继和接人线...
YD 5123-2005.Provisional Specification of Engineering Supervisionfor Long Haul Optical Fiber Cable Linc.1总则1.0.1 为规范长途通信光缆线路工程施工监理工作的内容...
YD 5125-2005.Provisional Supervision Speeification of Installation Engincering for Conmunication Equipment.1.总则1.0.1为规范通信设备安装工程施工 监理工作的内容、...