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Re: Detecting Loss of Phone Line

Subject: Re: Detecting Loss of Phone Line
From: "Roland Moore" <roland@xxxxxxxxxxxx>
Date: Mon, 18 Sep 2006 04:29:18 GMT
Newsgroups: alt.security.alarms
References: <356sg299eosrc7mfc5a0an8bg6bij5l45k@xxxxxxx>

I am certain someone would answer your question if you gave a little more
detail like who are you and why do you want to know. There are, as a
practical matter many different forms of alarm transmission via "phone
lines".

<oldman@xxxxxxxxxxx> wrote in message
news:356sg299eosrc7mfc5a0an8bg6bij5l45k@xxxxxxxxxx
> How do typical alarm panels DETECT that the phone line that is routed
> through them is be unavailable/inoperative? Do they periodically
> sample or continuously measure/detect? What do they measure?

References:
- Detecting Loss of Phone Line
  - From: oldman

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