企业通信网络是指在企业内部建立的通信网络，用于实现企业内部的通信和协作。QSIG和H.323是两种常用的企业通信网络协议，它们分别用于传输语音和数据。QSIG是一种基于ISDN的协议，用于传输语音和数据，而H.323是一种基于IP的协议，用于传输语音、视频和数据。

由于QSIG和H.323是两种不同的协议，它们之间的信令互通是非常重要的。ISO/IEC 23289:2002标准规定了QSIG和H.323之间的信令互通所需的基本服务，包括呼叫控制、用户身份验证、呼叫转移、呼叫等待、呼叫保持、呼叫恢复、呼叫拒绝、呼叫转接、呼叫转发、呼叫等级、呼叫优先级、呼叫分组、呼叫分配、呼叫排队、呼叫会议、呼叫广播、呼叫监视、呼叫跟踪、呼叫计费、呼叫记录、呼叫限制、呼叫拨号、呼叫等待、呼叫转移、呼叫拒绝、呼叫保持、呼叫恢复、呼叫转接、呼叫转发等。

ISO/IEC 23289:2002标准的实现可以使企业内部的通信更加高效和便捷。通过实现QSIG和H.323之间的信令互通，企业内部的通信可以更加灵活和自由，同时也可以提高企业的工作效率和生产力。

相关标准
ISO/IEC 11579-1:1995 Information technology -- Telecommunications and information exchange between systems -- Private Integrated Services Network -- Specification, functional models and information flows -- Part 1: Overview of the architecture
ISO/IEC 11579-2:1995 Information technology -- Telecommunications and information exchange between systems -- Private Integrated Services Network -- Specification, functional models and information flows -- Part 2: PSTN/ISDN simulation services
ISO/IEC 11579-3:1995 Information technology -- Telecommunications and information exchange between systems -- Private Integrated Services Network -- Specification, functional models and information flows -- Part 3: Inter-domain operations
ISO/IEC 11579-4:1995 Information technology -- Telecommunications and information exchange between systems -- Private Integrated Services Network -- Specification, functional models and information flows -- Part 4: Interworking at the Q reference point (QSIG)
ISO/IEC 11579-5:1995 Information technology -- Telecommunications and information exchange between systems -- Private Integrated Services Network -- Specification, functional models and information flows -- Part 5: Interworking at the N reference point (QSIG)