ISO/IEC 15505:2003
Information technology — Telecommunications and information exchange between systems — Private Integrated Services Network — Specification, functional model and information flows — Message Waiting Indication supplementary service
发布时间：2003-04-08 实施时间：


私有综合服务网络（PISN）是一种专用网络，它提供了一系列的通信服务，包括语音、数据和视频等。PISN可以基于数字传输技术实现，例如ISDN（集成服务数字网）和非ISDN网络。为了提高PISN的功能和性能，ISO/IEC 15505:2003标准规定了一系列的补充服务，其中包括消息等待指示补充服务。

消息等待指示补充服务是一种通知用户有新消息到达的服务。当用户的电话线路处于忙碌状态时，消息等待指示补充服务可以向用户发送一个提示音或灯光，告知用户有新消息到达。用户可以通过拨打特定的号码或按下特定的键来获取这些消息。消息等待指示补充服务可以提高用户的通信效率和便利性，特别是在用户需要及时处理重要消息的情况下。

ISO/IEC 15505:2003标准规定了消息等待指示补充服务的功能模型和信息流。该标准定义了消息等待指示补充服务的各种操作和参数，包括消息等待指示的激活和取消、消息等待指示的查询和响应等。此外，该标准还规定了消息等待指示补充服务的信息流，包括消息等待指示的发送和接收等。

ISO/IEC 15505:2003标准的实施可以提高PISN的功能和性能，特别是在用户需要及时处理重要消息的情况下。该标准的实施可以促进PISN的标准化和互操作性，从而提高PISN的可靠性和稳定性。

相关标准
- ISO/IEC 11579-1:1995 Information technology -- Telecommunications and information exchange between systems -- Private Integrated Services Network -- Inter-exchange signalling protocol -- Circuit-mode basic call control -- Part 1: Protocol specification
- ISO/IEC 11579-2:1995 Information technology -- Telecommunications and information exchange between systems -- Private Integrated Services Network -- Inter-exchange signalling protocol -- Circuit-mode basic call control -- Part 2: Protocol implementation conformance statement (PICS) proforma
- ISO/IEC 11579-3:1995 Information technology -- Telecommunications and information exchange between systems -- Private Integrated Services Network -- Inter-exchange signalling protocol -- Circuit-mode basic call control -- Part 3: Protocol implementation extra information for testing (PIXIT)
- ISO/IEC 11579-4:1995 Information technology -- Telecommunications and information exchange between systems -- Private Integrated Services Network -- Inter-exchange signalling protocol -- Circuit-mode basic call control -- Part 4: Protocol implementation conformance statement (PICS) proforma for the support of additional supplementary services
- ISO/IEC 11579-5:1995 Information technology -- Telecommunications and information exchange between systems -- Private Integrated Services Network -- Inter-exchange signalling protocol -- Circuit-mode basic call control -- Part 5: Protocol implementation extra information for testing (PIXIT) for the support of additional supplementary services