| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | See Detail | Status | Related Standard |
| YD/T 1931-2009 | English | 979 |
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Technical Requirements of Services based on the Unified IMS Call Forwarding Service(Release 1)
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YD/T 1931-2009
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YD/T 1931-2009
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