... and Client; F7123 GPS+GPRS ROUTERTECHNICAL SPECIFICATIONF7123 GPS+GPRS ROUTER is a kind of cellular terminal device that provides data ... , including online detect, auto redial when offline to make router always onlineEthernet port: 1.5KV magnetic isolation protectionRS232/RS485/RS422 ... , NAT, DMZ host etc.Support multi protocols, such as TCP/IP, UDP, ICMP, SMTP, HTTP, POP3, OICQ, TELNET, FTP, SNMP, ...