The GXP2135 is the ideal selection for busy users who value call control, productivity and usability, and manage medium to heavy call volumes. Features: Supports a variety of automated provisioning options Zero-configuration with Grandstream's UCM series IP PBXs Encrypted XML files and TR-069, to make mass deployment extremely easy 8 lines, 4 SIP accounts, 4 XML programmable context-sensitive soft keys Dual switched, auto-sensing Gigabit ports, built-in PoE 32 digitally programmable and customizable BLF/speed-dial keys Built-in Bluetooth for syncing headsets and mobile devices for contact books, calendars & call transferring HD audio on the handset and speakerphone; full duplex speakerphone Supports EHS compatible Plantronics headsets 4-way audio conferencing for easy conference calls GTIN 06947273701965 UPC 6947273701965