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Detail Programming Setup Values Continued
Long ago we could determine the source of the tone by shutting off the microphone and
testing if the tone disappeared. If the tone ceased, we knew it was being injected at the
microphone. With the advent of speed dialers and short tone burst technology, this has now
become an impossible task.
The fix is to require two tones. The first tone is the command tone and is also used to
shut off the microphone for a few seconds. The second same tone confirms the first and can
only have come from the resident, or security desk, since the microphone has been shut
off. If the second tone never arrives then the whole procedure is reset and no false
access will thus be granted.
Level-2 exists as a special case where some individuals, such as children, are found to be
granting access to undesirable elements. So while the child may answer a call from the
entry gate, they cannot grant access without knowing the full multi-digit access code.
This code can be up to 8 digits long. Also, level-2 employs the same microphone functions
as level-1 to prevent tone hacking at the microphone.
Typical use would be for example: The resident has an entry code of "13579" assigned to
them and receives a call. Upon recognition of the visitor, they would dial "0-13579-#",
where "0" is the command to allow entry, "13579" is their entry code and the "#" key
terminates the response. At this time entry would be granted. False attempts from within
the household to guess at the code will result in immediate call termination.
Auto Volume Control: (Defaults to 0)
Command to set: 2#n
Where "n" is the volume control value.
This unit employs electronic volume controls. Normal usage requires this value be set to
zero "0". With this setting the speaker volume is controlled automatically. It will be
lowered in quiet areas and will increase as the local noise increases near the microphone.
This mode also allows the unit to operate in full duplex because full duplex operation
requires dynamic timely adjustments to changes in the environment for noise and echo
cancellation. If a value other than zero "0" is used then that value forces a constant
volume level at the speaker. 1 is very soft and 9 is very loud. The value 5 or 6 is about
average.
Touch Tone Extension: (Defaults to 00)
Command to set: 5*nn
Where "nn" is the touch tone extension code number.
See Page 11 (Ring Counter) for additional detail on the role this value plays. This value
is used as an address extension for when several units may share a single phone line. When
such a line is called, all units will answer. The caller then sends this 2 digit extension
number via touch tones. The unit that has this extension assigned here remains on line
while the other units hang up on the received call. This allows you to touch tone program
this single unit without the other units getting in the way with their own response tones.
Modem Extension: (Defaults to 99)
Command to set: 5#nn
Where "nn" is the modem extension code number.
See Page 11 (Ring Counter) for additional detail on the role this value plays. This value
is used as an address extension for when several units may share a single phone line. When
such a line is called, all units will answer. The caller then sends this 2 digit extension
number via touch tones. The unit that has this extension assigned here remains on line
while the other units hang up on the received call. This allows you to program this single
unit via Modem without the other units getting in the way with their own Modems.
Call Length Timer: (Defaults to 180)
Command to set: 8nnn
Where "nnn" is the call length time limit in seconds.
This value must be 3 digits long. Normal range is 060 to 999 seconds. A call is limited in
duration to this value. When this value expires then that call is automatically hung up.
Summary of Contents for Uni-2010
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