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How to adjust the sounder on the D625 and the D623 keypads


 Use the following steps:

  1. Press [CMD][4][9].

  2. Enter passcode.

  3. Press and hold [*], and then press [1] or [4] to adjust volume.

  4. Press and hold [*], and then press [3] or [6] to adjust display brightness.

  5. Press [CMD] to exit the function