• Support SIP 2.0, TCP/UDP/IP, RTP/RTCP, HTTP, ARP/RARP, ICMP, DNS, DHCP, NTP, TFTP protocols
• Support NAT traversal using IETF STUN and symmetric RTP (compatible with Cisco’s ATA-186, etc)
• Advanced Digital Signal Processing (DSP) 
• 1 LAN port and 1 FXS interface
• Advanced and patent pending adaptive jitter buffer control, packet delay and loss concealment technology
• Support popular codecs including G.723.1 (5.3K/6.3K), G.729A/B, G.711 (a-law and u-law), G.726, iLBC, and G.728. Dynamic negotiation of codec and voice payload length
• Support standard voice features such as Caller ID Display or Block, FLASH, in-band and out-of-band DTMF (RFC2833), Dial Plans, off-hook auto dial, early dial, click-to-dial
• Support Silence Suppression, VAD (Voice Activity Detection), CNG (Comfort Noise Generation), Line Echo Cancellation (G.168), and AGC (Automatic Gain Control)
• Support DIGEST authentication and encryption using MD5 and MD5-sess.
• Support for Layer 2 (802.1Q VLAN, 802.1p) and Layer 3 QoS (ToS, DiffServ, MPLS)
• NAT-friendly remote software upgrade capability (via tftp) even from behind firewalls/NATs.

• Full Feature Voice/Fax-over-IP
• Ultra-compact and lightweight
• Universal Plug and Dial
• Very Highly affordable and effective IP solution
• Easy configuration thru manual operation or personalized automated provisioning via central configuration file for mass deployment.