• 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..
• Built-in Router, NAT, Gateway and DMZ port forwarding. Can also be configured to function as a two Ethernet ports bridge (NAT function is disabled) 
• Powerful digital signal processing (DSP) to ensure superb audio quality; advanced adaptive jitter control and packet loss concealment technology 
• Supports standard voice features such as Call keeping, Call Waiting, Hold, Transfer Forward, FLASH; Supports three way conference
• 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);
• Supports CALL Progress free enactment function.
• Supports the volume adjustment of gateway
• Supports SIP encrypts mode, avoid force-out
• Supports remote upgrade and upgrade configuration function
• Supports passing through and T.38 fax mode.

Technical parameter