Information technology -- Telecommunications and information exchange between systems -- Private Integrated Services Network -- Specification, functional model and information flows -- Recall supplementary service
文件核验信息（付费前可核对）
标准范围（官方英文摘要）
ISO/IEC 15051:2003 specifies supplementary service Recall (SS-RE), which is applicable to various basic services supported by Private Integrated Services Networks (PISN). Basic services are specified in ISO/IEC 11574.
SS-RE is a supplementary service which provides for the redirection of a call transferred by the served user back to the served user if the call is unanswered. SS-RE is only applicable after transfer by join, not after transfer by rerouteing.
Service specifications are produced in three stages, according to the method described in ETS 300 387. ISO/IEC 15051:2003 contains the stage 1 and stage 2 specifications of SS-RE. The stage 1 specification (clause 6) specifies the supplementary service as seen by users of PISNs. The stage 2 specification (clause 7) identifies the functional entities involved in the supplementary service and the information flows between them.
标准信息
- 标准号
- ISO/IEC 15051:2003
- 英文标题
- Information technology -- Telecommunications and information exchange between systems -- Private Integrated Services Network -- Specification, functional model and information flows -- Recall supplementary service
- 发布单位
- —
- 技术委员会
- ISO/IEC JTC 1/SC 6
- 版本 / 版次
- 2.0
- 状态
- 现行
- 发布日期
- 2003
- ICS 分类
- 33.040.35 电话网
- 页数
- 14 页
- 官方定价
- CHF 96
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