本程序可以在界面上输入电话号码后，进行拨号，并显示拨号状态，并有挂断的功能。-the procedure at the interface input telephone numbers, dial-up, and that dial-up state, and hung up functions.

本程序可以在界面上输入电话号码后，进行拨号，并显示拨号状态，并有挂断的功能。-the procedure at the interface input telephone numbers, dial-up, and that dial-up state, and hung up functions.