私有综合服务网络（PISN）是一种专门为企业或组织内部提供通信服务的网络。PISN可以提供多种通信服务，如语音通信、数据传输、传真等。为了满足企业或组织内部通信的需求，PISN需要提供一些特殊的功能，如呼叫转移、呼叫等待、呼叫保持等。呼叫干扰补充服务就是PISN中的一种特殊功能。

呼叫干扰补充服务是指在PISN中，当一个用户正在通话时，另一个用户可以插入自己的话语，从而干扰正在通话的用户。呼叫干扰补充服务可以用于企业或组织内部的培训、会议等场合，也可以用于紧急情况下的通知和警报。

ISO/IEC 14846:2003标准规定了PISN中呼叫干扰补充服务的信令协议。该标准定义了呼叫干扰的触发条件，包括呼叫干扰的请求、呼叫干扰的确认、呼叫干扰的取消等。同时，该标准还规定了呼叫干扰的处理过程，包括呼叫干扰的接收、呼叫干扰的处理、呼叫干扰的结束等。

ISO/IEC 14846:2003标准的实现可以提高PISN中呼叫干扰补充服务的可靠性和稳定性，保证PISN中呼叫干扰补充服务的正常运行。

相关标准
ISO/IEC 11572:1995 Information technology -- Telecommunications and information exchange between systems -- Private Integrated Services Network -- Inter-exchange signalling protocol -- Call Transfer supplementary service

ISO/IEC 11574:1995 Information technology -- Telecommunications and information exchange between systems -- Private Integrated Services Network -- Inter-exchange signalling protocol -- Call Waiting supplementary service

ISO/IEC 11576:1995 Information technology -- Telecommunications and information exchange between systems -- Private Integrated Services Network -- Inter-exchange signalling protocol -- Call Hold supplementary service

ISO/IEC 11579:1995 Information technology -- Telecommunications and information exchange between systems -- Private Integrated Services Network -- Inter-exchange signalling protocol -- Call Completion supplementary service

ISO/IEC 11582:1995 Information technology -- Telecommunications and information exchange between systems -- Private Integrated Services Network -- Inter-exchange signalling protocol -- Call Offer supplementary service