Bticino 342610 Notice De Montage page 44

OPERATION
After the last digit has been dialed, a sound signals the call
and the yellow LED (2) turns on .
If the called user answers, one may start talking and the
red LED (3) turns on.
In a system with several outdoor stations, if the sound
channel (line) is busy, one hears a busy tone similar to the
telephone one, and the red LED (3) flashes.
If the user doesn't answer after 30 seconds, one hears an
intermittent sound (time over), the yellow LED (2) flashes,
and the module returns to stand-by.
It is possible to go back to stand-by at any time by pressing
the "C" key (5).
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