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
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