PREN 300 356-17 V3.1.2 (1998) 标准详情
- 标准号：PREN 300 356-17 V3.1.2 (1998)
- 中文标题：
- 英文标题：Integrated Services Digital Network (isdn); Signalling System No. 7; Isdn User Part (isup) Version 3 For The International Interface; Part 17: Call Waiting (cw) Supplementary Service [itu-t Recommendation Q.733, Clause 1(1992), Modified]
- 标准类别：欧盟标准EN
- 发布日期：
