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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| YD/T 2181-2010 |
Technical requirements for presence service Basing on IMS (phase Ⅱ) 基于ims的呈现（presence）业务技术要求（第二阶段） |
China Telecommunication
Standards Basing |
 English PDF |
| YD/T 1803-2008 |
Test Method for Presence Service Basing on IMS (Phase Ⅰ) 基于ip多媒体子系统（ims）的呈现（presence）业务测试方法（第一阶段） |
China Telecommunication
Standards Basing |
English PDF |
| YD/T 1802-2008 |
Technical Requirements for Presence Service Basing on IMS(Phase Ⅰ) 基于ip多媒体子系统（ims）的呈现（presence）业务技术要求（第一阶段） |
China Telecommunication
Standards Basing |
English PDF |
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