ICS 33.040.50 CCS M 42 YD 中华人民共和国 通信行业标准 YD/T XXXXX—XXXX 接入网技术要求 50Gbit/s无源光网络 （50G-PON） 第2部分：物理媒质相关（ PMD）层要求 Technical requirements for access network - 50-Gigabit-capable passive optical networks (50G-PON) - Part 2: Physical media dependent (PMD) layer requirements （ITU-T G.9804.3 Amd.1,50-Gigabit-capable passive optical networks (50G-PON): Physical media dependent (PMD) layer specification, MOD） （报批稿） XXXX - XX - XX发布 XXXX - XX - XX实施 中华人民共和国工业和信息化部发布 YD/T 4300.2—XXXX I目  次 前 言 ............................................................................................................................................................. III 引 言 ................................................................................................................................................................... V 1 范围 ................................................................................................................................................................... 1 2 规范性引用文件 ............................................................................................................................................... 1 3 术语和定义 ....................................................................................................................................................... 1 4 缩略语 ............................................................................................................................................................... 2 5 光接入网架构 ................................................................................................................................................... 3 5.1 50G-PON 共存通用架构 ............................................................................................................................ 3 5.2 光路径损耗等级 ........................................................................................................................................ 4 5.3 光纤差分距离分类 .................................................................................................................................... 5 6 50G-PON 的PMD层要求 ................................................................................................................................. 5 6.1 线路速率 .................................................................................................................................................... 5 6.2 50G-PON 的FEC码型 ............................................................................................................................... 5 6.3 物理媒质和传输方法 ................................................................................................................................ 6 6.3.1 传输媒质 ............................................................................................................................................. 6 6.3.2 传输方法 ............................................................................................................................................. 6 6.4 线路码型与交织 ........................................................................................................................................ 6 6.5 工作波段 .................................................................................................................................................... 6 6.5.1 下行波长分配 ..................................................................................................................................... 6 6.5.2 上行波长分配 ..................................................................................................................................... 6 6.6 50G-PON 的PMD层参数 .......................................................................................................................... 6 6.6.1 与50G-PON 兼容的 ODN .................................................................................................................. 6 6.6.2 4