SPECIFICATIONS: • 1 GSM/WCDMA channel • Embedded Operation system • Carrier select • GSM: Quad-band 850/900/1800/1900MHz • PIN modified • SMS sending and receiving • PSTN and VoIP hotline • USSD, open API for SMS • WCDMA: 850/1900/2100MHz • Flexible dial plan, digit map • Ethernet Interface: 2*10/100M Base-Tx RJ45 • Static IP, PPPoE, DHCP • Network Protocol Support: • IP, TCP, UDP, TFTP, FTP, RTP, RTCP, ARP, RARP, ICMP Ping, NTP, SNTP, Http, DNS • NAT traversal: Static NAT, STUN • Static/dynamic ARP request • DSCP/ToS.