•  Support SIP2.0 £¬ TCP/UDP/IP, RTP/RTCP £¬ HTTP £¬ ICMP £¬ARP/RARP, DNS£¬DHCP (both client and server), NTP£¬PPPoE£¬TFTP, etc.
  •  Built-in router, NAT and Gateway
  •  Powerful digital signal processing (DSP) to ensure superb audio quality; advanced adaptive jitter control and packet loss concealment technology
  •  Ultra compact (wallet size) and lightweight design, great companion for travelers
  •  Support various vocoders including G.711 A-/U-law £¬ G.723.1, G.729A/B, G.728, G.726, iLBC.
  •  Support Caller ID/Name display or block, Hold, Call Waiting, Call Transfer, Call Forward, Flash, Three-Way Conferencing (pending)
  •  Support customizable ring tone (pending)
  •  Fax pass through and T.38 (pending)
  •  Support silence suppression and VAD £¬ AGC £¬ and echo cancellation (G.168)
  •  Support standard encryption and authentication (DIGEST using MD5 and MD5-sess)
  •  Support layer-2 (802.1Q VLAN, 802.1p) and layer-3 (DiffServ, ToS) QoS
  •  Support automated NAT traversal without manual manipulation of firewall/NAT
  •  Support remote automated provisioning and software upgrade even through firewall/NAT to enable ¡°zero configuration¡± and ¡°plug-and-dial¡± for end users
  •  Support device configuration via built-in IVR, Web browser or central configuration file
  •  Support DNS SRV Look Up
  •  SIP Server Fail Over (pending)