Voice over ip sip (rfc 3261)compliant g711a/u, g.729a/b voice codec dynamic jitter buffer avd, aec, cng in-band dtmf, out-of-band /dtmf (info, rfc2833) support qos Call features call transfer, call waiting, call hold, call forward, cid ect. Phone feature 64-chords polyphonic midi ring tone, mp3 ring tone and playback sound / vibration / sound& vibration call history£¡§inbound / outbound / missed£© phone book (500 records) speed dial (100 records) Applications alarm, calendar, calculator, world time Wireless lan 802.11e wnn / wnn-ps support g.711, g.729a/b, g.726 Wireless lan security wep (64/128bits wpa-psk/wpa2-psk(tkip and aes) md5 for sip authentication(rfc2069/rfc2617) 802.1x(ttls/md5) Network wireless lan site survey simple wlan profile configuration for instant Network connection dhcp/ static ip Management auto/manually provisioning system trace log£¬syslog for exception ntp time synchronization Packed in box of each piece, 10boxes to a carton Carton size:35*32*22.5cm G.W.:5.5kgs N.W.:4.6kgs.