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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| YD/T 958-1998 |
Digital subscriber signalling system No.1 (DSS1). signalling specification for frame mode basic call control 1号数字用户信令系统（dss1）帧方式基本呼叫控制信令技术规范 |
China Telecommunication
Standards Digital subscriber signalling |
 English PDF |
| YD/T 913-1997 |
Digital subscriber signalling system No.1 (DSS1)-typical DSS1 service indicator codings for ISDN telecommunications services 1号数字用户信令系统（dss1）－用于isdn电信业务的dss1业务指示编码 |
China Telecommunication
Standards Digital subscriber signalling |
English PDF |
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