Key features: Analogy PSTN support: With one RJ11 port. Support analogy PSTN line without Wifi connection. It can convert from WIFI VOIP calling mode and PSTN mode. Wireless Characteristics Security > Signal type: 802.11b/g >MD5 for SIP authentication (RFC2617) > 802.11b Data Rate: 1, 2, 5.5, 11 Mbps > IEEE 802.1x, 802.11i > 802.11g Data Rate: 6, 9, 12, 18, 24, 36, 48, 54 Mbps > WEP 64/128 bit encryption > WPA /WPA2 Operating Frequencies Dial methods > USA/Canada: 2.412 – 2.462 GHz (11 channels) > Direct IP call without SIP registration > Europe: 2.412 – 2.472 GHz (13 channels) > Dial registered number via SIP server > Japan: 2.412 – 2.472 and 2,484 GHz (14 Channels) > Dial URL from phone book / speed dial VoIP Protocol Voice Quality > IETF SIP (RFC3261) > Voice Activation Detection (VAD) > RFC2833 > Comfort Noise Generator (CNG) > Acoustic Echo Cancellation (AEC) LCD Display Tones > 128x128 pixels, 256 colors, 4 menu colors > DTMF > LED backlight > 10 Ring tones: WAV, 2 tone. > Ring back tone Keyboard > Dial tone > 16 Keys > Busy tone > Volume + and - > Key tone > 5 way navigation paddle > Keyboard backlight IP Assignment > Static IP Call Features > DHCP > Call Hold > Call Mute TCP/IP > Caller ID Display > UDP / DHCP / RTP / DNS > Anonymous call > Anonymous call blocking Environmental > Message waiting indicator > Operating temperature: 0 – 40C > Redial > Storage temperature: -20 – 60C > Operating humidity: 20 – 80% DTMF > Out of band (RFC2833) (Check us) Battery > SIP Info > Li-polymer 850mAh, 3.7 Volts > Talk time: 7 hours Codec > Standby time: 120 hours > G.711 u-law > G.711 a-law Accessories > G.722 > Power adapter 500mA > G.729a/b(TBA) > USB cable Phone Functions > Ring tone / Vibrator Certification compliance > Key lock > FCC Part 15B / 15C > Pre-dial before sending > CE Class B > Handset / Ring volume adjustment > SAR > Speed dial: 10 records > EN60950 > Phonebook: 50 records > Incoming call log Applications > Outgoing call log > Clock > Missed call log > Calendar NAT Traversal > STUN