2N 9135110E, Installation Manual

Page: 66 / 77

Installation manual 2N® Analog Vario
66 / 77
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
®
Analog Vario 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
®
Analog Vario 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.
•
Note
It is sometimes difficult to recognise the above-described situations reliably due to
a poor quality of the PSTN connection. Excessive noise in the surroundings may
also have a negative impact. However, this may only decelerate automatic dialling
(the busy tone may not be recognised, e.g.). Even if 2N
®
Analog Vario cannot
identify the DTMF, the connection is established (yet for a shorter time).
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