一个通过串口把PC机与MODEM连接的程序，可以接收和发送短信-Serial put through a PC and modem connection procedures can receive and send short messages

主要用于短信猫校正，当短信猫模块不好使，可以用本软件进行校正在使用！-Mainly used for SMS cat correction, when the cat SMS module does not work, can use this software school being used!