... PPPoE, DHCP, DNS, NAT, Telnet, HTTP, FTP, TFTPConfiguration and Management- Web-based GUI- Console, telnet command line- Centralized ... network managementFirmware UpdateLocal file, FTP, TFTP and HTTPMessage FeaturesSMS batch receiving/sending, AT command compatibleTelephony ... l Support SIP registration and peer-to-peer l Support encryption: RC4, VOS and Ejoin private etc. l Support ...