The GXP2000EXT module is an ideal solution for the busy enterprise environment looking to add the ability to receive and dispatch calls efficiently with the GXP2000. The additional 56 programmable buttons enhance productivity to achieve high customer satisfaction with inbound callers. » Supports for traditional call features on each of its programmable buttons, including BLA and BLF. » The GXP Expansion Module can daisy-chained x 2 EXT Modules to add 112 fully programmable phone extensions to the GXP