The GXP2020EXT delivers additional functionality, versatility and flexibility to Grandstreams GXP2020, GXP2120 and GXP2010 enterprise IP phone series. It is the ideal solution for offices that manage high call volumes or an office receptionist. By using the GXP2020EXT the telephone attendant can ensure maximum office productivity by efficiently monitoring and dispatching multiple incoming calls.56 programmable buttons (each with dual color LED) and up to 112 programmable buttons when two extension modules are daisy chained togetherSupports for traditional call features on each of its programmable buttons, including BLF (busy lamp field), conference/call transfer/forward/pick up  The GXP2020EXT delivers additional functionality, versatility and flexibility to Grandstreams GXP2020 and GXP2010 enterprise IP phone series. It is the ideal solution for offices that manage high call volumes or an office receptionist. By using the GXP2020EXT the telephone attendant can ensure maximum office productivity by efficiently monitoring and dispatching multiple incoming calls.56 programmable buttons (each with dual color LED) and up to 112 programmable buttons when two extension modules are daisy chained togetherSupports for traditional call features on each of its programmable buttons, including BLF (busy lamp field), conference/call transfer/forward/pick up 12.25" x 9.5" x 3.5" Warranty Information: Extended warranty available at extra cost per year. MFG# GXP2020-EXT

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