NXD-800 VOIP phone supports H323, SIP, MGCP, IAX2 and other protocols, offers one Or TWO Ethernet interface and is compatible with various softswitch systems and VoIP voice gateways to provide broadband IP voice service. Voip Phone (NXD-800)Key Features: 1. Unattended/ attended call transfer; Call hold; Configure file download and upload by palmtool; 2. Call waiting and per call-waiting blocking; Adjustable user password and super password; 3. Call waiting and per call-waiting blocking; Call forward (Always, busy, no answer); 4. Voip speed dial; VoIP digital map; Caller number/name display; Support four settings storage, switch by keypad; 5. User define ring tone; E. 164 dial plan and customize dial rules; Open source, user individuation firmware; 6. Voip speed dial; VoIP digital map; Per area ring tone support; E. 164 dial plan; 7. MWI(Message wait Indication); Configurable/Adaptive jitter buffer size; 8. Configurable Hook Flash time; Static/Dynamic WAN-IP-Addressing; 9. Supporting DHCP Server, used for the dynamic address allocation plan of LAN devices; 10. Static/Dynamic WAN-IP-Addressing; PPPoE; Http, telnet, keypad and dedicate manage tool; Voip Phone(NXD-800) Electric Spec: 1) Ethernet Port -- 1/2 X 10/100MHz Ethernet Port; AC/DC power adapter, 9V DC; DC input: 9V DC/800A; 2) Storage temperature: -30 degree to 65 degree (-22 degree to 149 degree); Operation temperature: 0 to 40 degree ( 32 degree to 104 degree)