• Terminal device with Standard SIP 2.0 protocol, highly commonality and fit to global extension.
• Supports SIP 2.0, TCP/UDP/IP, RTP/RTCP, ICMP, ARP/RARP, NTP, PPPoE, TFTP, HTTP, etc
• Supports G.711 (alaw and u-law), G.723.1 (5.3K/6.3K), G.726 (40K/32K/24K/16K), G.728, G.729A/B and iLBC..
• The powerful DSP digital audio processor to keep a wonderful audio-quality;
• Inside DNS, router, NAT, DMZ, the gateway and DHCP (the client end and the server end);   
• Control the audio flutter and concealment technology anti-lost message.
• Supports standard voice features such as Call keeping, Call Waiting, Hold, Transfer Forward, FLASH; Supports three way call
• Supports VAD, CNG, AGC, the echo cancellation (G.168) and Silence suppression.
• Supports layer 2 (802.1Q VLAN, 802.1p) and layer 3 QoS (ToS, iffServ, MPLS)
• Powerful remote management by TFTP or HTTP mode.
• To dispose through the browser or the voice hint.
• Supports auto-crossing firewall (NAT);
• Support CALL Progress free enactment function.
• Support the volume adjustment of gateway
• Support SIP encrypts mode, avoid force-out
• Support remote upgrade and upgrade configuration function
• Supports passing through and T.38 fax mode.
• Environmental designing, conform to the international electromagnetism radicalizations standard;
• Quality material, original circuit design, and no electric current noise, work steadily.
• Artistic Human-based appearance designing, let you feel the strong affinity for the product besides convenience for carrying.

Technical parameter