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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| YD/T 4222-2023 |
Implementation requirements for network security protection, planning, construction, and operation {译} 网络安全防护同规划同建设同运行实施要求 |
China Telecommunication Industry
Standards Implementation requirements network |
 English PDF |
| YD/T 4185-2023 |
Implementation requirements for interworking between IMS networks {译} IMS网间互通实施要求 |
China Telecommunication Industry
Standards Implementation requirements network |
English PDF |
| YD/T 1406-2005 |
Technical requirements of routing and implementation for inter-network emergency call service 公用电信网间紧急特种业务呼叫的路由和技术实现要求 |
China Telecommunication
Standards Implementation requirements network |
English PDF |
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