GXP2200EXT delivers additional functionality, versatility and flexibility to Grandstream GXP2200 enterprise IP phone. The GXP2200EXT module features a large 128 x 384 graphic LCD and 20 programmable buttons (each with dual color LED). In addition, it allows 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. The GXP2200EXT module is connected, powered, and controlled by the GXP2200, providing the benefits of the additional keys instantly.This expansion module supports the traditional call features on each of its programmable buttons, including BLA (bridged line appearance)/SCA (shared call appearance), BLF (busy lamp field, standard or eventlist), call park/pick-up, speed dial, presence, intercom, and conference/transfer/forward.The GXP2200EXT is the ideal solution for offices that manage high call volumes or an office receptionist. By using the GXP2200EXT the telephone attendant can ensure maximum office productivity by efficiently monitoring and dispatching multiple incoming calls.