YDT 1254-2003 接入网技术要求基于时分双工的以太数字用户线系统（TDD-EDSL）：可变长度帧传送模式

《YDT 1254-2003 接入网技术要求基于时分双工的以太数字用户线系统（TDD-EDSL）：可变长度帧传送模式》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、ICS33.040.50M42YU中华人民共和国通信行业标准丫D/T1254-2003接入网技术要求—基于时分双工的以太数字用户线系统(TDD-EDSL);可变长度帧传送模式Accessnetworktechnicalspecification-TDDbasedEthernetDigitalSubscriberLinesystemvariablelengthframetransmissionmode2003-01-28发布2003-01-28实施中华人民共和国信息产业部发布丫D/T1254-2003目次前言1范围····································

2、·······································································⋯⋯‘···⋯⋯1，‘规范性引用文件··································································································....⋯⋯1门j缩略语····························································，·······，········，···，···，··········

3、···············，··⋯14系统应用参考模型·················································。········.··.····.··.··..···.·.·············.⋯⋯21工口传送能力···············································································································⋯⋯3‘U接口············································

4、·········································································⋯⋯56.1业务节点接口··························································································......⋯⋯56.2用户网络接口··············································································.·····.·······.···⋯⋯56.3

5、线路接口(U一接口)······························································..........................66.4POTS分离器要求·····························································································⋯⋯8系统功能特性··················································································

6、·······················⋯⋯97.1ETU发送器参考模型············································································..........⋯⋯97.2收发器功能特性·····························································································⋯⋯97.3设备功能特性····················································

7、···················.......................⋯⋯17l78收发器训练及协议···························，················..................................................⋯⋯l78.1上电初始化···································································