HDM103G series is a full band 3G modem intended for data transmission via cellular communication networks with WCDMA HSPA+ (or WCDMA HSDPA or EVDO) and TCP/IP protocol stack. Among its main functions are data transmission by use of CSD and WCDMA (or EVDO) technologies, reception and transmission of voice signals, faxes and SMS-messages. Modem has USB and RS232 communication interface. Connection to this interface is carried out through terminal connector which allows USB and UART connection of one external device 14.4Mbps 3G modem 1.Band.850&900/1900/2100MHz 2.Embedded TCP,UDP,FTP protocol. 3.Rate.DL,14.4M,UL,5.76M 4.Lowcost 3G modem