Technical Features: Screen Gray scale LCD with background light 128*64 LCD Language Support Multi-Language Line 2 Function Keys 5 Navigation keys (Arrow button, OK button) Volume button (multiplex up and down keys) Hands-free Left soft key Right soft key Hold Redial Conference Transfer VoIP Protocol SIP 2.0 Network Protocol HTTP, BOOTP, FTP, TFTP, IEEE 802.1Q Codec G.723.1, G.729 A/B, G.711 A/U, G.722 QoS TOS, Jiffer Buffer, VAD, CNG, G.168 (32ms) Network 2¡ÁRJ45 10/100M Ethernet Interfaces (LAN/PC) IP Assignment: static IP, DHCP, PPPoE DNS Client, VLAN/QoS Route mode, Bridge mode Speech Hands-free model available by Full-duplex Separated 9 Level Volume Adjustment Call Processing Always Forward, Busy Forward, No-answer Forward Hotline line (Immediately/Delay) Call Waiting, Call Queuing Call Forward, Call Transfer, Call Holding, Call Pickup, *Callback Redial Phone directory speed dial, Call record direct dial 3-way conference DnD, Blacklist, SMS Voice mail, Voice Prompt, Voice Message Application Enterprise Phonebook, LDAP Phonebook Private phone directory SMS, push mail Security Login the website by password TR069 authenticate Signaling encryption Media encryption Management Upgrade: HTTP/TFTP/FTP Auto-provision/TR069 Configurations: Phone/Http/Auto provision/TR069 Debug: Telnet/Phone/Web Power Supply Power adapter:AC100~240V input and DC 5V/1A output PoE (IEEE 802.af) Specification Storage Temperature: 0¡æ ~ 60¡æ Operating Humidity: 10%~90% Size:275mm*215mm*90mm Net weight: 0.9kg