YD/T 1596-2007.Technical Specification and Testing Methods for Repeater Used in 2GHz cdma2000 Digital Cellular Mobile Communication Network. 1范围 YD/T

YD 5022-1996.Design Code for Public Packet Switched Data Network Engineering. 1总则 1.0.1为了使公用分组交换数据网网络设备安装工程的设计有所依据,特制定本规范。 1.0.2YD 5022适用于新建公用分组交换数据网工

YD 5023-1996.The Engineering Design Standard for the User Access Network. 1总则 1.0.1用户接入网工程设计暂行规定(以下简称“本规定”)是为加强邮电基本建设管理,提高工程设计质量,适应电信业务网发展的需要而编制的。 1.0

YD 5026-1996.Installation and design standard for cabling duct in the transmission room of long haul telecommunication. 1总则 1.0.1《长途通信传输机房铁架、槽道安装设计标准》

YD/T 1510-2007.Testing Methods for Nc interface between MSC Servers of 2GHz TD-SCDMA/WCDMA Mobile Communication Network (Phase I). 1.范围 YD/T 1510规定了2G

YD/T 1511-2007.Technical Specification for 2GHz TD-SCDMA/WCDMA CS Video Telephony Service. 1范围 YD/T 1511规定了TD-SCDMA/WCDMA数字蜂窝移动通信网电路域可视电话业务的业务总体特征、功能和

YD 5002-1994.Design Standard for Fire Protection of Posts & Communications Building. 1总则 1.0.1为了保障邮电建筑中邮电设备、 邮件以及人身的安全,在设计中贯彻“预防为主,防消结合”的方针，防止和臧少火

YD 5021-1996.Provisional Standards of SDH Engineering Design for Long-Distance Optical Fibre Cable Transmission Project. 1总则 1.0.1适用于新建及改、 扩建SDH长途光缆传输

YD/T 1501-2006.Digital Cellular Mobile Telecommunication Network Specification for Multimedia Message Service Terminal Equipment. 1范围 YD/T 1501规定了数字蜂窝

YD/T 1500-2006.Testing Methods of Multimedia Messaging Service Center in Digital Cellular Mobile Telecommunication Network. 1范围 YD/T 1500规定了数字蜂窝移动通信网多