Support SIP2.0,TCP/IP,RTP/RTCP,HTTP,ICMP,ARP,DHCP,NTP/SNTP,TETP protocols
Support STUN and symmetric RTP for NAT
Interoperable with various 3rd party SIP end user device , Proxy / Registrar / Server , and gateway products.
Advanced 32bit embed MCU + DSP technology to ensure superior audio quality.
Advanced adaptive jitter buffer control, packet delay and loss concealment technology
Line Echo Cancellation�GG.168
Support popular vocoders including G.723, G.729A/B, G.711(a-law and u-law), G.726
Support standard voice feature such as Caller ID Display ,Call Forward, in-band and out-of-band DTMF, Dial Plans
CNG (Comfort noise generation)
Support Silence Suppression, VAD(Voice Activity Detection), CNG(Comfort Noise Generation), Line Echo Cancellation(G.168), and AGC(Automatic Gain Control)

Network Interface�G2 RJ45
RJ11 interface:1 RJ11 for telephone,1 RJ11 for PSTN pass throught
Universal Switching Power Adaptor: Input AC 220V/110V,Output DC 5V,1500mA
Dimension�G170��110��30mm�]Real size)
Dimension�G245��130��55 (Cartoon size)