企业通信网络是现代企业中不可或缺的一部分，它可以提高企业内部的沟通效率和协作能力。QSIG和SIP是两种常见的企业通信网络协议，它们分别用于传输语音和数据。然而，由于QSIG和SIP之间的差异，它们之间的信令交互并不容易实现。因此，ISO/IEC 23915:2005标准应运而生，它规定了QSIG和SIP之间的信令交互，以实现呼叫转移功能。

呼叫转移是企业通信网络中常见的一种功能，它可以将来电转移到其他电话号码或语音信箱。在QSIG和SIP之间实现呼叫转移需要进行信令交互，以确保呼叫转移的正确执行。ISO/IEC 23915:2005标准规定了QSIG和SIP之间的信令交互过程，包括呼叫转移请求、呼叫转移确认、呼叫转移取消等。

ISO/IEC 23915:2005标准的实现可以提高企业通信网络的互通性和可靠性，使得企业内部的沟通更加高效和便捷。同时，该标准的实现也可以降低企业通信网络的维护成本和管理难度，提高企业的运营效率和竞争力。

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 -- 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 Transfer 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 Transfer Supplementary Service -- Part 3: 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 Transfer Supplementary Service -- Part 4: Protocol implementation extra information for testing (PIXIT) for the support of additional network features
- 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 -- Part 5: Protocol implementation conformance statement (PICS) proforma for the support of additional network features