BS ISO/IEC 8480-1995 信息技术.系统间电信和信息交换.采用ITU-T推荐标准V.24交换电路的数据终端设备(DTE)/数据通信设备(DCE)界面备份控制操作

标准号：BS ISO/IEC 8480-1995
中文标准名称：信息技术.系统间电信和信息交换.采用ITU-T推荐标准V.24交换电路的数据终端设备(DTE)/数据通信设备(DCE)界面备份控制操作
英文标准名称：Information technology - Telecommunications and information exchange between systems - DTE/DCE interface back-up control operation using ITU-T Recommendation V.24 interchange circuits
标准类型：L78
发布日期：1996/1/15 12:00:00
实施日期：1996/1/15 12:00:00
中国标准分类号：L78
国际标准分类号：35.100.10;35.200
适用范围：This International Standard specifies the procedures for back-up operation applicable to data transmission on a leased line when implemented through a single interface, controlling both the leased and the back-up facilities, using ITU-T Recommendation V.24 interchange circuits in conjunction with either the 25-pole connector (ISO 2110) or the 26-pole connector (ISO/IEC 11569). The method used to switch the transmission of data automatically from the leased line to or from the back-up facility is not specified in this International Standard. This International Standard is not applicable where back-up (calling or answering) is achieved by manual means. NOTES 1 The procedures specified in this International Standard may be used at the answering end only, the calling end only, or both ends of a connection. 2 An ordinary DCE (i.e. one not implementing back-up control) may be provided at either end of the back-up circuit and only for back-up purposes. For example, a calling station could provide one or more separate auto-dial GSTN lines to provide back-up on demand to a greater number of leased lines.