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Chinese National Standard Category: Communication network in general

English Title: Technical Specifications for SDH Network Synchronous State Information
Chinese Title: SDH网的同步状态信息技术规范
Standard No.: YDN 121-1999
Category No.: M10
Issued by: 0
Issued on: 1999-11-1
Implemented on: 1996-2-1
Status: valid
Superseded by:
Superseded on:
Abolished on:
Superseding:
Word Count:18000 words
Similar Standards: GB/T 11591-1989   YD/T 4159-2022   YD/T 4164-2022   YD/T 4150-2022   YD/T 4160-2022   GY/T 352-2021   DB37/T 3645-2019   T/CCSA 229-2018   YD/T 2093-2018   YD/T 3314-2018   GB/T 34084-2017   GB/T 34082-2017   YDB 162-2015   YDB 164-2015   YDB 157-2015   GB/T 29198-2012   DB31/T 534-2011   YD/T 2057-2009   YD/T 2016.2-2009   YD/T 2021-2009  
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