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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| YD/T 2944-2023 |
Technical requirements for transmission of calling number between IMS networks {译} IMS网间主叫号码传送技术要求 |
China Telecommunication Industry
Standards Transmission calling number |
 English PDF |
| YD/T 1157-2022 |
Transmission of calling number between networks {译} 网间主叫号码的传送 |
China Telecommunication Industry
Standards Transmission calling number |
English PDF |
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