ITU-T Q.475-1989 标准详情
- 标准号:ITU-T Q.475-1989
- 中文标题:信号程序-常规信号的向外释放
- 英文标题:Signalling Procedures - Normal Release of Outgoing and Incoming R2 Registers - Specifications of Signalling Systems R1 and R2 (Study Group XI) 2 PP
- 标准类别:国际电信联盟标准
- 发布日期:1989-01-01
In the case where outgoing R2 registers in national exchanges are only able to interpret a Iimited number of Group B signais or are indeed not able to interpret any, it is essential that such equipment be able to respond to signal A-3 in the specific
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