Key Features of the IP Phone UTP3000 - 3 lines indicators with individual SIP account profiles - SIP supports SIP domain, SIP authentication (none, basic, MD5), DNS name of server, Peer to Peer/ IP call - Compatible with IAX2 protocol - Large 128X96 high resolution graphic backlit LCD (3.2í¦) - RJ9 and 3.5MM headset jack - 6 programmable keys, 3 context-sensitive soft keys, a 5-position navigation key, volume keys and predefined keys for voicemail, call transfer, call hold, mute, redial, speaker, phonebook, etc. - Full-duplex speakerphone with advanced acoustic echo cancellation (96ms max filter length). - Dual 10/100Mbps Ethernet ports (switched/routed) with integrated Power over Ethernet (802.3af) - Support DHCP (client/server), Static IP, PPPoE for xDSL - Support codec: G.711(A-law/u-law), G.723.1 (5.3k/6.3k), G.729A/B, G.726, G.722 - Advanced Digital Signal Processing (DSP) to ensure superb hi-fidelity audio quality - Support Silence Suppression, VAD (Voice Activity Detection), CNG (Comfort Noise Generation), Line Echo Cancellation (G.168/165), and AGC (Automatic Gain Control) - DTMF relay: RFC2833, SIP info - Call features: voicemail, SMS, caller ID display or block, conference call, call Forward, call Transfer (blind or attended), call hold, call waiting, paging and intercom, call park/pickup, join call, click to dial, DND, black list, limited list, call history - Call Logs: Incoming call, Outgoing call, Missed call (100 entries each); Phonebook: 500 entries - Support NAT Traversal (STUN); VLAN (voice VLAN / data VLAN); QoS with diffserv; VPN (L2TP); SRTP security protocol; SNTP Client; DMZ; Firewall; DNS relay; Main DNS and secondary DNS server. - Support auto-provisioning through TFTP/TFP/HTTP for mass deployment - Support management via keypad, web interfaces and telnet - Reversible base stand / wall mount 10 PCS/CTN Carton Meas.:640X370X305mm Inner Box Dimension:315X290X70mm.