ISO/IEC 17877:2000
Information technology — Telecommunications and information exchange between systems — Private Integrated Services Network — Specification, functional model and information flows — Private User Mobility (PUM) — Call handling additional network features
发布时间：2000-04-13 实施时间：


私有综合服务网络（PISN）是一种专用的通信网络，用于在组织内部提供通信服务。PISN可以提供多种通信服务，如语音、数据和视频。用户移动性（PUM）是指用户可以在PISN中移动，而不会影响其通信服务。呼叫处理是指在PISN中处理呼叫的过程。

ISO/IEC 17877:2000标准规定了PISN中用户移动性和呼叫处理的额外网络功能。这些功能包括：

1. 呼叫等待：当用户正在通话时，可以接受另一个呼叫，并在通话结束后接听该呼叫。

2. 呼叫转移：用户可以将呼叫转移到另一个终端或号码。

3. 呼叫保持：用户可以将呼叫保持在一个终端上，并在另一个终端上接听。

4. 呼叫重试：如果呼叫失败，可以自动重试呼叫。

5. 呼叫拒绝：用户可以拒绝接听呼叫。

6. 呼叫转接：用户可以将呼叫转移到另一个用户。

7. 呼叫等待提示音：当用户正在通话时，可以听到另一个呼叫的提示音。

8. 呼叫等待显示：当用户正在通话时，可以看到另一个呼叫的来电显示。

9. 呼叫等待振铃：当用户正在通话时，可以感觉到另一个呼叫的振铃。

10. 呼叫等待忽略：用户可以选择忽略另一个呼叫。

ISO/IEC 17877:2000标准还规定了PISN中用户移动性和呼叫处理的功能模型和信息流。功能模型描述了PISN中用户移动性和呼叫处理的功能，信息流描述了PISN中用户移动性和呼叫处理的信息流动。

该标准适用于所有PISN，包括ISDN（集成服务数字网络）和非ISDN网络。该标准还适用于所有PUM和呼叫处理的额外网络功能。

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 -- Call-related supplementary services -- 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 -- Call-related supplementary services -- 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 -- Call-related supplementary services -- 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 -- Call-related supplementary services -- Part 4: Protocol implementation extra information for testing (PIXIT) for the support of intelligent network capability set 1 (INCS1)
- ISO/IEC 11579-5:1995 Information technology -- Telecommunications and information exchange between systems -- Private Integrated Services Network -- Inter-exchange signalling protocol -- Call-related supplementary services -- Part 5: Protocol implementation extra information for testing (PIXIT) for the support of intelligent network capability set 2 (INCS2)