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

Also we can provide you the 1, 2 and 4 port with FXS and FXO Gateway/ATA/Adapter.
For more information pls review the webiste: http//www.speed-voip.com
Or contact with me by email: lynn@speed-voip.com

Lynn
MSN: svoipsales@hotmail.com