PRETS 300 356-18-1993
PRETS 300 356-18-1993 标准详情
- 标准号：PRETS 300 356-18-1993
- 中文标题：
- 英文标题：Integrated Services Digital Network (isdn) - Ccitt Signalling System No. 7, Isdn User Part (isup) Version 2 For The International Interface Part 18: Completion Of Calls To Busy
- 标准类别：欧洲通信ETS,I-ETS,PRI-ETSETS
- 发布日期：
内容简介
SUBSCRIBER (CCBS)Specifies the stage three of the pan-European Integrated Services Digital Network (ISDN) as provided by the European public telecommunications operators for the Completion of Calls to Busy Subscriber (CCBS) supplementary service, by
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