Call to internal unit (outgoing)
Note: before connecting the audio channels with any other device, the internal unit Art. 40505 determines
the best possible communication parameters. During this stage, which lasts approximately 1 second,
a waiting tone is transmitted to the user.
To make a call to another internal unit, at least one call must be programmed as described above.
No specic programming is required for a generic porter switchboard.
The gure below shows the situation when all the keys are programmed. This operating context, designated
Intercom, is obtained by touching the P/A key when in standby mode or by switching from the Operators
context, also by touching P/A.
Call to internal unit
T1 and T4 make a call to an internal unit, T2 and T3 call two specic porter switchboards, M call a generic
porter switchboard.
The call is initiated by touching one of the above keys. Before the call is answered, the display changes to the
following:
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