Dean,
To me at least an analogue line is the traditional home telephone line - if
you can plug a regular home telephone in and get a dialtone, that's it.
Some alarm systems - to my understanding usually places like banks or
jewellery stores - have a special service (I don't recall the official name)
which is an always open connection from your alarm panel back to a receiver
at an alarm company with a continuous heartbeat to overcome the possibility
of someone just cutting the line. These don't have dialtone.
Assuming that you have just an ordinary PSTN analogue line, is it possible
that the line is also being used for a DSL service? If you don't have a
suitable line filter to block the high frequency DSL information I could
understand that there would be issues with devices like alarm panels, fax
machines, and such.
Some DSL services are delivered on a dedicated local loop - ie a pair of
copper wires from your premises back to the nearest CO - that does not try
piggy-back regular voice service on the single pair of copper wires.
Hope this is helpful.
Regards,
Doug.
----- Original Message -----
From: "Dean Yorke" <[email protected]>
To: "asterisk Mailing" <[email protected]>
Sent: Thursday, March 05, 2009 4:29 PM
Subject: [on-asterisk] alarm systems
Hi All,
I know that this might be a little off topic but.......
Wondering if someone can help me understand the difference between an
analogue line and a local loop line from bell.
we have a couple pieces of equipment, (pitney bowes mail machine and
personal install alarm system) that are having issues communicating on
these lines.
Thanks
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