just kidding.
page 86 of the owners manual.

Reminder signal
You can program a reminder signal –
memo – to be heard every hour, so that
you are sure not to miss a news broadcast.
Press the left side of the button.
Press:
MEMO OFF appears in the display for
entry and call-up buttons, and the tone
symbol will appear in the upper right of
the display.
A signal is then heard 15 seconds
before each hour.

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