Supports 3 lines, 3 SIP accounts and 4-way voice conferencing 2.8 inch (320x240) color-screen LCD Dual Gigabit ports, integrated PoE 8 dual-colored BLF/speed-dial keys HD audio on speakerphone and handset Integrated Bluetooth 4 programmable context-sensitive soft keys

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

Supports 4 lines, 4 SIP accounts and 5-way voice conferencing HD audio on speakerphone and handset, 5 programmable context-sensitive soft keys Compatible with GXP2200 LCD extension module (GXP2200 EXT) 4.3 inch (480x272) color-screen LCD Dual Gigabit ports, integrated PoE Integrated Bluetooth for use with Bluetooth headsets and Bluetooth-enabled mobile devices (transferring contact books and calls), USB, EHS for Plantronics headsets

Supports 6 lines, 6 SIP accounts and 6-way voice conferencing 4.3 inch (480x272) color-screen LCD Dual Gigabit ports, integrated PoE HD audio on speakerphone and handset, 5 programmable context-sensitive soft keys 24 dual-colored BLF/speed dial keys Integrated Bluetooth

12 lines, 6 SIP accounts, 5 soft keys and 5-way voice conferencing 48 on-screen digitally customizable BLF/speed-dial keys 4.3 inch (480x272) color-screen LCD Dual Gigabit ports, integrated PoE Integrated Bluetooth Supports up to four GXP2200EXT Modules for BLF/speed-dial access to up to 160 contacts