Additional Details ------------------------------ Product description: The GXP2140 is a Linux-based device with 4 lines, Gigabit ports to guarantee the fastest possible connection speeds, 5 XML programmable soft keys for customization and 5-way voice conferencing to keep business users in-touch. By being compatible with Grandstream?s GXP2200EXT extension module, the GXP2140 can offer users up to 160 speed-dial/BLF keys by combining up to 4 GXP2200EXTs to easily monitor presence and status of other extensions and transfer calls. HD audio and a 4.3" color LCD screen create high quality calls and built-in Bluetooth support allows for use of Bluetooth headsets and transferring of phonebook and calls from paired mobile devices. This Enterprise IP phone also features Electronic Hook Switch support for Plantronics headsets and a built-in USB port. The GXP2140 is perfect for Enterprise SMB customers with the need for quality and versatility in their desktop communications. As all Grandstream IP phones do, the GXP2140 features state-of-the-art security encryption technology (SRTP and TLS). The GXP2140 supports a variety of automated provisioning options, including zero-configuration with Grandstream?s UCM series IP PBXs, encrypted XML files and TR-069, to make mass deployment extremely easy.