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SIP是企业通信网络中常用的两种信令协议，它们分别用于传输语音和数据。在企业通信网络中，呼叫转移是一项非常重要的功能，它可以将呼叫从一个终端转移到另一个终端，以便实现更好的通信效果。

ISO/IEC 23916:2005标准规定了QSIG和SIP之间的呼叫转移的信令交互。该标准定义了QSIG和SIP之间的呼叫转移的信令流程，包括呼叫转移请求、呼叫转移确认、呼叫转移拒绝、呼叫转移取消等。该标准还规定了QSIG和SIP之间的呼叫转移的信令参数，包括呼叫转移目的地、呼叫转移原因、呼叫转移状态等。

该标准的实现可以使企业通信网络中的QSIG和SIP之间实现呼叫转移功能，从而提高企业内部的通信效率和协作效果。该标准的实现还可以使企业通信网络中的QSIG和SIP之间实现互通，从而实现企业内部的通信和协作。

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 transfer supplementary service
- ISO/IEC 11579-2:1995 Information technology -- Telecommunications and information exchange between systems -- Private Integrated Services Network -- Inter-exchange signalling protocol -- Call transfer supplementary service -- 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 transfer supplementary service -- Abstract test suite (ATS) and protocol implementation conformance statement (PICS) proforma
- ISO/IEC 11579-4:1995 Information technology -- Telecommunications and information exchange between systems -- Private Integrated Services Network -- Inter-exchange signalling protocol -- Call transfer supplementary service -- Protocol implementation extra information for testing (PIXIT)
- ISO/IEC 11579-5:1995 Information technology -- Telecommunications and information exchange between systems -- Private Integrated Services Network -- Inter-exchange signalling protocol -- Call transfer supplementary service -- Protocol implementation conformance statement (PICS) proforma