私有综合服务网络（PISN）是一种基于ISDN和PSTN的通信网络，它提供了一系列的增值服务，如呼叫等待、呼叫转移、呼叫保持等。路径替换是PISN中的一项附加网络功能，它允许在呼叫过程中更改呼叫的路径，以便提高呼叫的质量和效率。

ISO/IEC 13863:1998标准规定了路径替换附加网络功能的规范、功能模型和信息流。该标准定义了路径替换的基本概念、术语和定义，以及路径替换的功能要求和信息流程。此外，该标准还规定了路径替换的实现方式和测试方法。

路径替换的实现方式可以采用硬件或软件的方式，具体取决于PISN的实际情况。在实现路径替换功能时，需要考虑到网络的安全性、可靠性和性能等方面的问题。因此，该标准还规定了路径替换的安全性、可靠性和性能要求，以及测试方法。

ISO/IEC 13863:1998标准的发布，对于PISN的发展和应用具有重要的意义。它为PISN的设计、实现和测试提供了标准化的依据，有助于提高PISN的质量和效率，促进PISN的应用和推广。

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 — 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 — 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 — Part 3: Abstract test suite (ATS) and 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 — Part 4: Protocol Implementation eXtra Information for Testing (PIXIT) for the QSIG basic call control supplementary services
- ISO/IEC 11579-5:1995 Information technology — Telecommunications and information exchange between systems — Private Integrated Services Network — Inter-exchange signalling protocol — Part 5: Protocol Implementation eXtra Information for Testing (PIXIT) for the QSIG supplementary services