4 FXS ports VoIP Gateways,
With 2 10M/100M Ethernet ports,
Built-in Router function,
Codec: G.711 u/a law, G.729, G.729 a/b, G.726
Fax Protocol: G.711 pass-through, T.38
Echo Cancel: G.168 (128ms)
IP Assignment: Static IP, DHCP, PPPoE
Voice Guarantee: VAD, CNG, AEC, AGC
QoS: ToS field
Dial Signal: Pulse dialing 10/20 pps, DTMF dialing
NAT Traversal: STUN, Proprietary tunnel-based TCSP, Fresh Open
Call Functions: Call Transfer, Call Forward, Call Hold / Retrieve, Call Waiting, Caller ID Display, Caller ID Blocking, Anonymous Call Blocking, Hook Flash
FXO Support: Includes all VoIP features as well as additional PSTN related features
Compliance FCC / CE / C-Tick / Rosh

For more information, please review the website at: http://www.speed-voip.com/index-34.html
Or contact with me by email: xd.wong@speed-voip.com, andywong-01@hotmail.com