Promotion   Low price pap2t voip gateway with high quality 

Product characteristic
 1.  Support SIP2.0 (RFC3261), TCP/UDP/IP, RTP/RTCP/, HTTP, ICMP ARP/RARP, DNS,
  DHCP, NTP, PPPoE, STUN, and TFTP etc;
 2.  Inside Rooter/NAT, gateway, and DMZ Port transmit; 
 3.  Support the PETN making or receiving calls (by the FXO Port);
 4.  Use the DSP CNOS chip to keeping a wonderful audio-quality, advanced shaking
  control, and the technology of hiding the lost massage;
 5.  Support kinds of voice coding, including G.711 (alaw and u-law), G.723.1
  (5.3k/6.3k), G.726 (40K/32K/24K/16K/), G.729A/B, and iLBC;
 6.  Support incoming call on show, restricting, and holding, disconnection, call
  transfer, call divert, DTMF, dialing project, etc;
 7.  Support conference call;
 8.  Support passing through and T38 fax;
 9.  Support layer 2 (802.1Q VLAN, 802.1p) and layer 3 (QoS, DiffServ, ToS);
 10.  Support NAT auto- penetrating, no need to modify the setting of the NAT;
 11.  Support configuration files by inside IVR equipment, Web browser, or TFTP and
  HTTP Center Server;
 12.  Support upgrading encrypts configuration files by TFTP or HTTP; 
 13. Microminiaturize and legerity design (size as a wallet), a adapter that
  convenient for schlepping.