SS ETS 300 121 Ed. 1 标准详情
- 标准号：SS ETS 300 121 Ed. 1
- 中文标题：
- 英文标题：Integrated Services Digital Network (isdn) - Application Of The Isdn User Part (isup) Of Ccitt Signalling System No. 7 For International Isdn Interconnections (isup Version 1)
- 标准类别：新加坡SS
- 发布日期：
