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| Chinese National Standard Category: Data communication equipment |
| English Title: | The technical specification for unified IMS(Phase 2) based services -One number multi-device |
| Chinese Title: | 基于统一IMS（第二阶段）的业务技术要求 一号多终端业务 |
| Standard No.: | YD/T 4149-2022 |
| Category No.: | M32 |
| Issued by: | MIIT |
| Issued on: | 2022-9-30 |
| Implemented on: | 2023-1-1 |
| Status: | valid |
| Superseded by: | |
| Superseded on: | |
| Abolished on: | |
| Superseding: | |
| Word Count: | 13500 words |
| Similar Standards: |
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