Grandstream 12 Lines, 6 SIP Accounts, PoE + GigE, Color GXP217012 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 Supports up to four GXP2200EXT Modules for BLF speed dial access to up to 160 contacts Our most powerful High End IP Phone, designed for the high call volume user who requires a suite of call control and efficiency focused features. Bring heavy communications