YD/T 1837-2008.Testing Methods for Interface Between BSS and CN for the CDMA-based Digital Trunking Mobile Communication System. 1范围 YD/T 1837规定了基于CDM

YD/T 5174-2008.Provisional Specification on Engineering Acceptance for 2GHz TD-SCDMA Digital Cellular Mobile Communication System. 1总则 1.0.1YD/T 5174规

YD/T 1839-2008.Test Specifications of Air Interface for the CDMA-based Digital Trunking Mobile Communication System. 1范围 YD/T 1839规定了基于CDMA技术的数字集群系统移动

YD/T 1802-2008.Technical Requirements for Presence Service Basing on IMS(Phase I). 1范围 YD/T 1802规定了基于IMS的呈现业务的基本概念、体系结构、上下文模型、参考点、安全、计费、注册、SIP方法等呈现业务运

YD/T 1816-2008.The Limit Requirement and Test Method of the Acoustic Noise Emitted by the Telecommunication Equipment. 1范围 YD/T 1816主要规定电信设备的噪声发射限值和测量

YD/T 1817-2008.DC Remote Feeding Power System for Telecommunication Equipment. 1范围 YD/T 1817规定了通信设备用直流远供电源系统(以下简称远供系统)的定义、分类、要求、测试方法及设备的标志、包装、运输和存储。 Y

YD/T 1819-2008.Integrative Gather Frame Which Used in Communication Equipment. 1范围 YD/T 1819规定了通信设备用综合集装架(以下简称综合集装架)的定义、要求、试验方法、检验规则和标志、包装、运输和贮存。 YD/T

YD/T 1820-2008.Telecommunication Cables - Central Office Symmetrical Cables. 1范围 YD/T 1820规定了通信电缆一局用对称电缆的产 品分类、要求、试验方法、检验规则、标志、包装及储运等要求。 YD/T 1820适用于程

YD/T 2691-2014.Test methods for connection speed in broadband network - User experience of internet surfing. 1范围 YD/T 2691规定了互联网业务用户使用上网浏览、网络视频和网络下载三种

YD/T 2691-2014.Test methods for connection speed in broadband network - User experience of internet surfing. 1范围 YD/T 2691规定了互联网业务用户使用上网浏览、网络视频和网络下载三种