Voip phone (nxd-804) Product :voip phone Item:nxd-804 (support rohs and poe standard) Description: Dual voip/pstn interface ip-phone;easy to switch voip and pstn via ip-phone; Voice signaling:support sip simultaneous voip calls;support sip v2 standard (rfc3261);register up to 4 server simultaneously; support multiple dialing plan / call hunting group;adaptive jitter buffer function;support multiple dialing plan / call hunting group;flexible routing table and profile;extensible by external ivr/cdr/billing servers for value- added application. Management: web interface management;support auto-provision system;remotely configuration/upgrade by web ui or auto provision;build-in watching dog for auto recovery. Call handing features:call timer display;call transfer, hold, forward, pickup;local three-way conferencing;one- touch speed dial for 6 keys;missed call notification;forward call (always/on busy/no answer);last call return redial;call by ip address via dial pad;voice message (extensible by external ivr);phone book directory (100 entries);ring melody selectable(voip/pstn/hold);customize melody;time and date display. Dimensions:34cmx24cmx9cm(packing with box) N.W.:1.8kgs g.W.:20kgs