... phone. -Support remote software upgrade safely function. -Support dynamic IP address, LAN, Internet (ADSL and Cable Modem). -Network protocols ... : HTTP, TCP/IP, UDP, SMTP, PPPoE, DDNS, DNS, SNTP, DHCP, FTP, SNMP ... serial port with several built-in high-speed domes and decoder protocols, Supports transparent protocols. -Auto-recovery function if ...