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 Model: HT-522



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2-FXS Port with 2-PSTN Bypass Port
Support dual protocols: ITU-H.323 V4 and IETF SIP V2
Provide 2 RJ-11 port for a POTS phone or a PBX's trunk line
Provide 2 RJ-45 Ethernet Ports
Provide 2 RJ-11 port for PSTN Life Line (Bypass only)
Support call forward/transfer/hold, phone book
Support G.711 A/μ law, G.729A/B, G.723.1 Codecs
Support QoS, NAT transversal and router function
Support VAD, CNG, EC