Features:

• Supports SIP 2.0 (RFC 3261) , TCP/ UDP/ IP, RTP/ RTCP, HTTP, ICMP, ARP/ RARP, DNS, DHCP (both client and server) , NTP, PPPoE, STUN, UPNP, TFTP, etc.
• Built-in router, NAT, Gateway and port forwarding
• Supports call origination and termination from/ to the PSTN network
• Powerful digital signal processing (DSP) to ensure superb audio quality; advanced adaptive jitter control • and packet loss concealment technology
• Support various vocoders including G. 711 (a-law and u-law) , G. 729A/ B etc.
• Support Caller ID/ Name display or block, Hold, Call Waiting/ Flash, Call Transfer, Call Forward, in-band • and out-of-band DTMF, Dial Plans, etc.
• Support fax pass through and T. 38 (Pending) .
• Support Silence Suppression, VAD (Voice Activity Detection) , CNG (Comfort Noise
• Generation) , Line Echo Cancellation (G. 168) , and AGC (Automatic Gain Control)
• Support standard encryption and authentication (DIGEST using MD5 and MD5-sess)
• Support for Layer 2 (802.1Q VLAN, 802.1p) and Layer 3 QoS (ToS, DiffServ, MPLS)
• Support automated NAT traversal without manual manipulation of firewall/ NAT
• Support device configuration via built-in IVR, Web browser or central configuration file through TFTP or HTTP
• Support firmware upgrade via TFTP or HTTP with encrypted configuration files.
• Support volume amplification
• Support configurable Call Progress Tones
• Ultra compact (wallet size) and lightweight design, great companion for travelers
• Compact, lightweight Universal Power adapter.