GSM/GPRS Feature RF Band : GSM900/1800/1900 Tri-band default (GSM850/900/1800/1900 Quad-band option) Output Power : Class4(2W) for GSM850/900 Class1(1W) for GSM1800/1900 RX Sensitivity : BER Max. -102dBm Vocoder : FR, EFR GPRS : Class 10, download up to 80kbps SIM : 3V, 1.8V Support Calling Features Dialed Number Display Caller ID Display Calling Time Display Call History Redial / Speed Dial Supplementary Services Call Hold/Resume, Call Forwarding, Call Transfer, Call Waiting SMS support VoIP Features VoIP Protocol SIP (Session Initiation Protocol) V 2.0 Support (RFC3261) SDP (RFC2327) RTP (RFC1889) RTCP (RFC1890) DTMF Transfer : In-band/Out-band(RFC2833) Voice Codec : G.729 a/b, G.711 a/u-law G.168 Echo Canceller Voice Packet Size : G.711(10/20/30msec), G.729(20~80msec) Silence Suppression Voice Activity Detection (VAD) Comfort Noise Generation (CNG) Adaptive Jitter Buffer Support ToS/DiffServ for QoS 802.11 e EDCA(Enhanced Distributed Channel Access) Network Features W-LAN IEEE 802.11b/g RF channels : Up to 13 Frequency range: 2.412 ~ 2.484 GHz Tx Power Range: > 300m out-doors (Open space) > 16 dBm (802.11b), > 14 dBm(802.11g) IP Networks DHCP or Static Configuration Option NTP Support for Real Time Roaming Site Survey, Seamless-Roaming Support Handover support in same Network Class(SSID) Security MD5 SIP authentication 64/128 bit Static Wired Equivalent Privacy (WEP) IEEE 802.1x EAP/MD5 System Power Consumption : Stand-by : 2mA, Talk : 250mA RF and battery level indication Call Forwarding Indication Hot key for vibrator / ring toggle Air firmware upgrade