... layer to upper application layer,such as TCP/IP/UDP and so on.And it supports static ... and packet filterSupport multi protocols , such as TCP/IP,UDP,ICMP,SMTP,HTTP,POP3,OICQ,TELNET,FTP ,SNMP ... connectionSupport multi WAN dial method, including auto allocated IP, specifying local IP, specifying local and remote IPCan be used ... SCO UNIX etc EF3223 wireless router, CDMA router, wifi router, WCDMA router