短信modem驱动程序&接口。西门子mc39i的modem设备运行正常，提供pdu模式收发短信；modem拨号上网等功能-SMS modem driver & interface. Siemens mc39i the modem is operating normally, providing pdu mode send and receive SMS modem dial-up Internet access and other functions

Send SMS in PDU mode thats help using at commands.