?         Supports SIP 2.0(RFC 3261), TCP/UDP/IP, RTP/RTCP, HTTP, ICMP,  ARP/RARP, DNS, DHCP (both client and server), NTP, PPPoE, STUN, TFTP, etc.

?         Built-in router, NAT, Gateway and DMZ 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.723.1  (5.3K/6.3K), G.726 (40K/32K/24K/16K), as well as G.728, G.729A/B, and iLBC.

?         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.

?         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.