2FXS VOIP Gateway (IAD2020)

SIP (RFC3261, RFC2543)
Support IAX2
Voice Codec: G. 711A/u, G. 729, G726
G. 168 echo cancellation standard, compliant 96ms echo cancellation with speaker mode
Jitter Buffer, VAD, CNG, SIP, Domain name register, point-to-point Call
RTP and RTCP
Support DTMF Inbound/Outbound transmission; SIP info, DTMF Relay, RFC2833
Many countries' standard ring
NAT transversal: Support STUN, CITRON, AVS Mode
Support SIP domain, SIP Authentication (none, basic, MD5), Domain Name parse
Support register two SIP server synchronously, can make a call by either proxy
Support SIP application, including SIP Call forward/transfer/holding/waiting Network Features
Support two models: Bridge and Router, integrate two ports router function.
Support basic NAT and NAPT
Support PPPoE for xDSL, and support auto redial when disconnect.
Support DHCP Client for WAN.
Support DHCP server for LAN
Support DNS relay for LAN, can provide DNS service for LAN N...

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