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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| YD/T 1087-2000 |
Technical Specification of ISDN User-network Interface (Supplementary Part to Support IP Access) isdn用户——网络接口规范（补充支持ip接入） |
China Telecommunication
Standards ISDN user network |
 English PDF |
| YD/T 976-1998 |
B-ISDN user-network interface physical layer specification b-isdn用户网络接口（uni）物理层规范 |
China Telecommunication
Standards ISDN user network |
English PDF |
| YD/T 941-1997 |
ISDN user-network interface supplementary service conformance testing specification isdn用户－网络接口补充业务 一致性测试规范 |
China Telecommunication
Standards ISDN user network |
English PDF |
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