七号信令的信令连接控制部分(SCCP)的应用大大增加了消息传递部分(MTP)的寻址功能.在GSM网里,移动交换中心(MSC)、访问位置寄存器(VLR)、归属位上寄存器(HLR)、鉴权中心(AUC)和设备识别寄存器(EIR)之间的移动应用部分(MAP)的消息传递是由七号信令的SCCP负责完成.本文首先介绍SCCP的寻址原理,然后结合国内GSM组网方式,阐述其具体寻址过程,最后举一个实际测试的例子. The application of Signaling Connection Control Part (SCCP) of SS7 has greatly increased the addressing function of MTP. In GSM network, Mobile Switching Center (MSC), Visitor Location Register (VLR), Home Location Messaging of the Mobile Application Part (MAP) between the HLR, AUC and EIR is done by SCCP of SS7 This paper first introduces the addressing principle of SCCP , And then combined with the domestic GSM network approach to elaborate on its specific addressing process, and finally give an example of actual testing.