Offering voip gateway, ip telephone users superb audio quality, rich functionality, interoperable with leading ip-pbx and soft switch systems, and compatibility with most voip service providers. The eia2001qc is ultra-compact, works with any pstn or cordless phone and fax machines and offers the simplicity of plug-and-dial, making it ideal for residential and soho users. - 1 fxs port with rj11 - 1 pstn pass through port - 2*10m/100mbps network ports - voice codecs: g.711, g723.1, g.729 a/b - t.38 or g.711 bypass - ideal ip enabler for analog phones, faxes and legacy pbx system - vad(voice activity detection) with cng(comfort noise generation) and plc (packet loss concealment),dynamic jitter buffer l2/l3 qos - web/telnet configuration, auto provisioning, pppoe, dhcp client/server - support polarity reversal - call hold, call waiting, call forward, do not disturb - direct ip calling, blind transfer, attended transfer g.168 echo cancellation.