Rfc 2833/inband dtmf Stun - rfc 3489 Dhcp - rfc 2132 Http/tftp for provisioning and firmware upgrade 4. Advanced features Wep 64/128 bit, wpa-psk tkip Ap handover/roaming Wifi network search Auto scan Sip server failover Dns server failover Voice mail indication Aes encrypted remote provisioning Scripting support for http based hotspot login Web based provisioning * requires network support. Key features Bar type design 802.11b/g Sip based call processing Web interface for management Remote handset management Earphone supported Languages:english, spanish, french, chinese Local log/system log Technical profile Subject specifications Dimensions 11 x 4.5 x 2.2cm (hxwxd) Weight 111 g Battery li-ion dc 3.6v 1500mah Charger input 100~240vac 50 ~ 60hz 120ma Talk time approximately 5 hours (approx.) Charging time 3 ~ 4 hours Standby time 50 ~ 100 hours Certification Fcc id:06y-f1000g Ic and ce Systemstandards Communication systemwi-fi (802.11b/g) Frequency band 2.4ghz Transmission output 20mw. Device to be packed in box of each piece, 10 boxes to a carton. Carton size:35*32*22.5cm Gross weight:5.5kgs Net weight:4.6kgs.