Grandstream GXP1760 Mid-range HD IP Phone 6 lines, 6 dual-color line keys (with 3 SIP accounts), 4 XML programmable context-sensitive soft keys 5-way audio conferencing for easy conference calls 24 digitally programmable & customizable BLF/fast-dial keys Built-in USB port for importing and exporting data only HD wideband audio, full-duplex hands-free speakerphone with advanced acoustic echo cancellation Built-in PoE to power the devices and give it a network connection Supports EHS compatible Plantronics’s headsets