2FXS VOIP Gateway (IAD2020)

Detailed Product Description

support protocol

SIP (RFC3261,RFC2543)
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 Network equipment
Use advanced DSP tech to insure high quality voice.
Use advanced jitter buffer tech to prevent the delaying and losing for info package.
Support Network Tools, including ping, race route, telnet client.
Support three modes to configure WAN port IP, they are: static, DHCP, and PPPoE.
Provide firewall control for small LAN.
Provide optional priority level for small LAN.
Support Second Layer QoS(802.1p)

Advanced Functions

It can register to two separate SIP server synchronously, that is to say multithreading register
Call waiting, call transfer, 3-way call, many modes call forward.
Caller ID display, forbid call out; setup avoid-disturb, dial auto while picking up the handset.
Set blacklist number and limit number.
Support point-to-point call.
Set the number end mode
Set fixed calling mode.
Support Silence Suppression, VAD (Voice Activity Detection).
Support CNG(Comfort Noise Generation).
Support Echo Suppression and AGC (Automatic Gain Control).
Support VPN (L2TP) function, can be used in the VPN special network
Support polarity reversal