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The Cisco IP Phone 8800 Key Expansion Module is a reliable communication solution that enables collaboration and increases productivity. It extends the capabilities of the Cisco IP Phone 8851, 8861 and 8865 models with additional buttons and a color LCD display. This key expansion module adds 18 physical keys with access to 18 additional keys, using the page keys, for a total of 36 additional keys. You can connect up to three 8800 KEMs to the IP Phone 8861 and 8865, and up to two 8800 KEMs to the IP Phone 8851.