Re: Looking for continuous, encrypted central station alarm monitoring with line cut detection

["Roland Moore" <roland@xxxxxxxxxxxx>]

I installed those units back in the day. They were variations of polarity
reversing modules. For grade AA line security they used a pseudo random
code. You could hang a butt set and actually hear it. There were more
complex setups for line security from other vendors at the time, it's just
that ADEMCO was what was available to most anyone. Potter Direct Wire ,
McCullough Loops. Morse Polling Computers, Twin Tron were some of the
vendors from that time and most used solid copper circuits.

An example of what is used today for line security would be this:
The D6600 NetCom System uses the
new National Institute of Standards and Technology/
Advanced Encryption Standard (NIST/AES) Rijndael
encryption algorithm, meeting U.S. Government
requirements for high security Intrusion Detection
Systems (IDS) using data networks for
alarm communications.
This multiple award-winning system has been an
industry leader, becoming the first product that uses
the Internet for alarm communications to receive an
Underwriters Laboratories Listing for use in UL 864
Commercial Fire Alarm System applications. This
listing makes it possible for many thousands of
networked commercial locations to eliminate the
expense of telephone lines that are dedicated to
the central station fire signaling system. The D6600
NetCom System is also listed for use in UL 1610
Grade AA Burglary and Line Supervision applications.


"Beachcomber" <invalid@xxxxxxxxxxxx> wrote in message
news:4617305c.16654343@xxxxxxxxxxxxxxxxxxx
>
>
> When I was installing Ademco Alarms in the late 70's, it was quite
> common to install dedicated line,dc reversing relay, and central
> station monitoring.  This was in the days when the central alarm
> monitoring station was in the local area of the town itself, or
> sometimes even at the police station.  One of these panels was briefly
> featured in the old Clint Eastwood movie "Thunderbolt and Lightfoot".
> It had a DC ammeter and a 'line trouble' lamp for each account module.
>
> As I return to to the alarm business these days, times have certainly
> changed.  The dedicated lines seem to not be used quite as often
> (maybe because of the expense and complexity in dealing with the phone
> co?) Apparently, POTS dialers are used in most alarms and almost all
> police departments require permits, separate alarm monitoring
> companies, etc.
>
> Here's my question -  Back in the 70's, Admeco had a super-secure and
> encrypted central station that would alert the attendant to line cuts
> and could not be defeated by the spoofing techniques that Jim Belushi
> used in the movie "Thief" (i.e. inserting DC power supplies in the
> telephone/alarm lines).
>
> Is there an equivalent of this system today?   That is...
>
> 1.  Requires continuous duplex communications over a dedicated phone
> line.
> 2.  Passes encrypted and verified data back and forth to minimize
> intruder 'spoofing' attempts.
> 3.  In addition to alarm notification, it alerts the operator to line
> cuts or when someone is otherwise tampering with the phone line.
>
> When I search for Ademco on the Internet these days, I get redirected
> to Honeywell sites.  Did Honeywell buy Ademco?
>
> Any information greatly appreciated!
>
> Beachcomber
>