Re: Vista 20 - Alarm Sounded in middle of night and turned off on its own.

["tourman" <rh.campbell@xxxxxxxxxxxxx>]

As the previous poster said, it is possible that your panel TLM setting
(telephone line monitor) is set for "alarm if armed". What this means
is, IF the panel is armed, AND the phone line goes out, the panel will
sound the siren. It won't send anything, just blow the horn (the idea
being I guess that if someone cuts your phone line, the siren will
scare them off).

Ask your installer what the current setting is in your panel.

Danny wrote:
> KRTYSteve wrote:
> > I have an ademco vista 20 with a 6150 keypad.  Have had it for about 3
> > years.  In the middle of the night last night, the alarm sounded for
> > about 15 seconds, then turned off on its own.  There was no record of
> > anything happening on the keypad...in fact it still had the red light
> > as if it was armed and ready....And nobody called us from the
> > headquarters.  So it's as if nothing happened, but I can't figure out
> > why the alarm sounded.
> >
> > Anyone heard of this before or have any ideas what may have caused
> > this?
> >
> > -Steve
> >
> phone line monitor?