Support SIP 2. 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
Support popular vocoders including G. 723, G. 729A /B, G. 711(a-law and u-law), G. 726(40K/32K/24K/16K)
Support standard voice feature such as caller ID display or block, call waiting, Hold, transfer, forward, in-band and out-of-band DTMF, dial plans
Support silence suppression, VAD(voice activity detection), CNG(comfort noise
generation), line echo cancellation(G. 168), and AGC(automatic gain control)