... GSM Cellular Network2,SMS receiving/batch sending, AT command compatible3,Support SIP registration and peer-to-peer4,Support ... HTTP, FTP, TFTPConfiguration andMaintenance·Web-based GUI·Console, Telnet command line·Centralized network managementFirmware UpdateLocal file, FTP, TFTP and HTTPTelephony ... Features·Hot-line call·Dial plan·Speed dial·Phone book·CDR· ...