ISO/IEC 13870:2003
Information technology — Telecommunications and information exchange between systems — Private Integrated Services Network — Inter-exchange signalling protocol — Call Completion supplementary services
发布时间：2003-04-08 实施时间：


私有综合服务网络（PISN）是一种专用的通信网络，用于在企业内部或组织内部提供通信服务。PISN可以提供多种服务，如语音通信、数据传输、传真和视频会议等。为了实现这些服务，PISN需要使用一种互换信令协议，以便在不同的PISN之间进行通信。

ISO/IEC 13870:2003标准规定了PISN之间的呼叫完成补充服务的互换信令协议。呼叫完成补充服务是指在呼叫过程中提供的一些额外服务，如呼叫等待、呼叫保持、呼叫转移和呼叫重试等。这些服务可以提高通信的效率和质量，使用户能够更加方便地使用PISN。

ISO/IEC 13870:2003标准规定了呼叫完成补充服务的互换信令协议，包括呼叫等待、呼叫保持、呼叫转移和呼叫重试等服务。这些服务可以在不同的PISN之间进行互换，以便用户能够在不同的PISN之间进行通信。例如，当用户在一个PISN上进行通话时，可以使用呼叫等待服务来接听另一个PISN上的来电，或者使用呼叫保持服务将当前通话保持，以便在另一个PISN上进行通话。

ISO/IEC 13870:2003标准还规定了呼叫完成补充服务的信令流程和消息格式。这些规定确保了不同的PISN之间可以正确地互换呼叫完成补充服务，从而提高了通信的效率和质量。

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 offer 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 offer 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 offer 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 offer supplementary services - Part 4: Protocol implementation extra information for testing (PIXIT) for the support of intelligent network capability set 1 (INC1)
- ISO/IEC 11579-5:1995 Information technology - Telecommunications and information exchange between systems - Private Integrated Services Network - Inter-exchange signalling protocol - Call offer supplementary services - Part 5: Protocol implementation extra information for testing (PIXIT) for the support of intelligent network capability set 2 (INC2)