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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| YD/T 1958-2009 |
Technical Requirements for PDH Virtual concatenation and GFP Mapping 准同步数字体系（pdh）虚级联和通用成帧规程（gfp）帧映射技术要求 |
China Telecommunication
Standards concatenation |
 English PDF |
| YD/T 1631-2007 |
Technical Requirements for Synchronous Digital Hierarchy (SDH)virtual concatenation and link capacity adjuxtment scheme 同步数字体系(sdh)虚级联及链路容量调整方案)技术要求 |
China Telecommunication
Standards concatenation |
English PDF |
| YD/T 163L-2007 |
Virtual concatenations and links of synchronous digital hierarchy (SDH) 同步数字体系(SDH)虚级联及链路容量调整方案(LCAS)技术要求 |
China Telecommunication
Standards concatenation |
English PDF |
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