通过TA，TE发送AT指令来控制移动台(Mobile Station，MS)的功能，与GSM 网络业务进行交互。用户可以通过AT指令进行呼叫、短信、电话本、数据业务、传真等方面的控制。-Sent through the TA, TE AT commands to control the function of the mobile station (Mobile Station, MS), and to interact with the GSM network business. Throug