Two-line semi-graphical display 47 keys, 13 LEDs 12 programmable function keys Speakerphone Dual Ethernet connection Power over Ethernet Headset connection SIP RFC3261 Security: SIPS/SRTP, TLS STUN, ENUM, NAT, ICE Compression: G.723.1 and others National Language Support Power Supply Included A 2 x 24 semi-graphical LCD display and menu-driven user interface support easy feature management. 12 programmable keys with LEDs support flexible trunk access/key configuration. A 100 number call memory, 100 entry onboard address book (to which data may easily be uploaded), custom call blocking, configurable/downloadable ring-tones, auto-answer mode, DND and other sophisticated features ensure convenience and productivity. And the Biztouch 5's built-in web server supports even simpler end-user configuration, screen dialing, and access to call history. The Biztouch 5 is remote-manageable and firmware-upgradable, uniquely easy to install, and largely self- configuring. Broad codec support and full compatibility with current SIP recommendations ensure interoperability; support for STUN (NAT traversal), ENUM (for dialed-number resolution) and other state-of-the-art features enables flexible deployment behind local proxies, IP PBXs or hosted VoIP services. The Biztouch 5 supports the security standard SRTP - a current specification from the Internet Engineering Task Force (IETF) for protection against eavesdropping -and TLS for protection against sniffing of signaling and authentication data. By limiting the need for external conference bridges/media server capacity or use of conference services for routine multiparty calls, the Biztouch 5's built-in three-party conference bridge helps limit total cost of ownership, while also insuring high audio quality and low latency. Note: This phone does not include a power supply. These phones are not refurbished.