2N Door intercom 2N Helios - Manual, 1322 v3.0 - Manual (Page 62)

Section for Advanced Users 4.2
62
Silent Automatic Multiple Number Dialling
This mode fully conceals the fact that a telephone call is made. When a button is
pressed, the loudspeaker is off and no PBX or dialling tone can be heard. The
loudspeaker is switched on when the called subscriber confirms connection (by
pressing
on its telephone). Thus, a potential thief cannot establish whether the
called person is in the building or not.
Otherwise, the function is the same as with Automatic Multiple Number Dialling with
Confirmation.
2N® Helios Identification
There are situations in which the calling person does not want to or cannot speak for
security reasons in the automatic dialling mode. In these cases, 2N® Helios can play
back a message stored in its memory. The test series includes the “Wait please,
connection is being established" message. Later, more messages will be available to
the user.
DTMF Control
If Automatic Multiple Number Dialling with Confirmation or Silent Automatic Multiple
Number Dialling is enabled, 2N® Helios can be controlled as shown in the table
below. For convenience, commands 1 to 5 are arranged as they are usually used.
DTMF
Character
FUNCTION
Confirmation indicating to 2N® Helios that a call was successful.
2N® Helios sends its confirmation signal, the call goes on until the
end of timeout and any of the following commands can be used.
Message muting (during playback).
WARNING! You may not speak while 2N® Helios is playing back
the message!!!
Message re-plays (once).
or
Call extension: a call is extended by 30 seconds by this command.
Can be used repeatedly.
or
Call termination.
to ,
These digits are interpreted as a password beginning - for switch
control.
Notes
 These commands do not work in the Automatic Multiple Number Dialling
mode without Confirmation!