CAME BPT AGATA V Manuel De L'utilisateur page 14

Intercom (Agata VC/B - Agata VC/B-L only)
To call an internal receiver,
Int. 1
pick up the handset and
press the button for the
receiver you want.
During a conversation
between internal receivers,
a call from an entry
panel is signalled to the
Int. 1
receivers with a beep that
is repeated every 5".
3 successive beeps
indicate that it is not
possible to make calls
because the line is busy.