GXP2200EXT delivers additional functionality, versatility and flexibility to Grandstream’s GXP2140 and GXP2170 Enterprise IP Phones and GXV3240 Video IP Phone for Android™. The GXP2200EXT module features a large 128 x 384 graphic LCD and 20 programmable buttons (each with dual color LED). It offers up to 40 extensions per module by using the 2 page switch keys and up to 160 buttons when 4 extension modules are daisy-chained together.This extension module is connected, powered, and controlled by the host phone to provide the benefit of additional extension keys instantly. The GXP2200EXT supports the traditional 0 features on each of its programmable buttons, BLF (busy lamp field, standard or eventlist), 0 park/pick-up, speed dial, presence, intercom, and conference/ transfer/forward. The GXP2200EXT is the ideal solutions for any receptionist or businesses managing high 0 volume. When using the GXP2200EXT, the telephone attendant can ensure maximum productivity by efficiently monitoring and dispatching multiples incoming 0s.