ISO/IEC 14844:2003
Information technology -- Telecommunications and information exchange between systems -- Private Integrated Services Network -- Inter-exchange signalling protocol -- Do Not Disturb and Do Not Disturb Override supplementary services
发布时间：2003-03-21 实施时间：


私有综合服务网络（PISN）是一种专用的通信网络，用于在企业或组织内部提供各种通信服务，如电话、传真、数据传输等。PISN通常由私有交换机、路由器、网关等设备组成，可以提供高质量、安全、可靠的通信服务。为了实现不同PISN之间的互联互通，需要制定一些互换信令协议，以便在不同的PISN之间进行通信。

ISO/IEC 14844:2003标准是一种互换信令协议，用于规定PISN之间的勿扰和勿扰覆盖补充服务。勿扰和勿扰覆盖是一种常见的电话服务，用于在用户不希望被打扰的时候，将来电转移到其他号码或直接拒绝来电。勿扰和勿扰覆盖补充服务可以提高用户的通信效率和舒适度，是PISN中必不可少的服务之一。

ISO/IEC 14844:2003标准规定了勿扰和勿扰覆盖补充服务的功能和信令流程。勿扰补充服务允许用户在特定情况下将来电转移到其他号码，如用户正在忙碌、正在通话中、不在办公室等。勿扰覆盖补充服务允许用户在特定情况下直接拒绝来电，如用户正在休息、不希望被打扰等。ISO/IEC 14844:2003标准还规定了勿扰和勿扰覆盖补充服务的消息格式和参数，以便在PISN之间进行互操作。

ISO/IEC 14844:2003标准的实现可以提高PISN之间的互联互通能力，增强用户的通信体验。该标准适用于各种类型的PISN，如企业内部通信网络、医院内部通信网络、政府机构内部通信网络等。

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 Completion supplementary service -- 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 Completion supplementary service -- 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 Completion supplementary service -- 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 -- Call Completion supplementary service -- Part 4: Test suite structure and test purposes

ISO/IEC 11579-5:1995 Information technology -- Telecommunications and information exchange between systems -- Private Integrated Services Network -- Inter-exchange signalling protocol -- Call Completion supplementary service -- Part 5: Protocol implementation extra information for testing (PIXIT) for the Q reference point