上网卡3G拨号，通过AT命令集实现，界面是贴图的，很实用。-3G network card on the dial, achieved through the AT command set, the interface is the map, it is practical.

VS2005 COM9 属于标准AT命令的GSM模块可以显示出当前信号强度 CSQ：强度（0-31），信噪-The VS2005, COM9. Belongs to the GSM standard AT command module can display the current signal strength CSQ: strength (0-31), the signal to noise