Interfaces:
1 X WAN
1 X LAN

Voice Features:
Support SIP RFC3261
Codec: G.711A/u, G.7231 high/low, G.729
Echo cancellation: Support G.168, and Hands-free can support 96ms
Support Voice Gain Setting, Jitter Buffer, VAD, CNG, dual GK, call forward, and Peer to Peer
NAT transverse: support STUN client, Citron, AVS
SIP support SIP domain, SIP authentication (none, basic, MD5), DNS name of server, Peer to Peer
SIP support Pubic & Private server. Can connect to public SIP and Private SIP server at the same time
SIP support dual public server
DTMF: Support SIP info, DTMF Relay, RFC2833
SIP application: support Call forward/transfer/holding/waiting
Call control features: Flexible dial map, support Hotline, Empty calling No. Reject service, Black list for reject authenticated call, No disturb, Caller ID.
Support conference call and voice record
English, Spanish, Czechoslovak alternative

 
Network Features:
WAN/LAN: Support Bridge and Router model
Support basic NAT and NAPT
Support PPPoE for xDSL
Support DHCP Client on WAN
Support DHCP Server on LAN
Support DNS Relay, SNTP Client, Firewall
Network tools in telnet server: Including ping, trace route, telnet client

Maintenance and Management:
Support Boot Monitor
Can upgrade firmware through boot monitor
Can config through Web, keypad, Telnet
Can upgrade firmware and configuration file through HTTP, FTP, TFTP
Support Syslog

Certifications:
CE, FCC Certified