Boosting the capabilities of your phone: The expansion modules for the 8800 series boost capabilities of your phone. The mobility modules – Bluetooth and WiFi modules – allow the user to receive and end calls anywhere in the office. The innovative DSS/BLF call coverage function adds 12 flexible buttons with 3 color LED per module. The DSS function dials the idle extension for transfers or direct calling and the BLF function indicates the line status. The call coverage function gives the user direct access to incoming calls. The innovative DSS/BLF Call coverage function makes the 8800 series the ideal choice for small attendant answering or secretarial call coverage positions.