VB的MODEM通信源代码，包括MODEM初始化，自动检测电脑串口数量，MODEM参数设置等-VB source code for the MODEM communications, including MODEM initialization, the computer automatically detects the serial number, MODEM parameter setting, etc.

GPRS模块发短信,通过初始化串口，用at命令来控制GPRS模块进行短信息的发送-GPRS module send text messages through the serial port initialization, use at command to control the GPRS module to send a short message

MODEM线路初始化,包括速率设置,工作模式,是否采用纠错编码方式等-MODEM circuit initialization, including rate setting, operation mode, whether using error correction coding, etc.