... ),DHCP server and client,DDNS (dynamic DNS),firewall,NAT and DMZ host.It provides a secure,high speed,reliable wireless Internet ... environment protection, electric power system,post and weather fields.Wireless SpecificationCompliant with S-95 A/B and CDMA2000 1xRTTSupport 13K QCELP ... firewall and packet filterSupport multi protocols , such as TCP/IP,UDP,ICMP,SMTP,HTTP,POP3,OICQ,TELNET,FTP ,SNMP , ...