Re: 26. NEWBEES, if possible avoid wireless alarm systems

[Crash Gordon® <webmaster@xxxxxxxxxxxxxxxxxxxxx>]

Craig...you're trying to reason with an incorrigible moron troll (he =
wears underwear made of tin-foil)...don't bother he'll make you crazy =
too.


"Craig B" <twl3001@xxxxxxxxxxx> wrote in message =
news:BFNpe.67286$6k7.12491@xxxxxxxxxxxxxxxxxxxxxxxxx
> Just an FYI, most wireless systems, if they are to meet UL =
requirements for=20
> resi or commercial burg (and fire too for that matter), are REQUIRED =
to send=20
> a supervisory report at least every hour which includes bits that tell =
the=20
> panel the batteries are low.  UL requires that this signal is sent=20
> consistently every hour thereafter, and the battery must last for two =
weeks=20
> after the initial low battery signal.
>=20
> As for interference, most panels if they are worth their salt include =
some=20
> sort of option which provides a time window after which, if the=20
> above-mentioned supervision signals are not received from EVERY =
sensor, the=20
> panel will notify the user and/or the central station.  Thus, it looks =
like=20
> somehow your system may have been sending the signals to the central =
station=20
> but not alerting you.
>=20
> Out of curiosity, which system was giving you this trouble?
>=20
> Craig B.
>=20
>=20
> <--> wrote in message =
news:uciba110rm8fs20unqhlo7uq934ploimrc@xxxxxxxxxx
> >
> > They are not reliable and are dead on warning when a transmitter
> > operates in a condition who muzzle the wireless alarm system.
> >
> > This is easily done with Radio Transmitters operating:
> > - ON the wireless frequency
> > - Saturating the receiver
> > - Intermodulation
> > - Harmonics
> > - Falling in the receiver bandpass
> > - On the IF frequency
> > - and more...
> > This is what i call basically Radio Frequency Interferences (RFI) =
but
> > in fact it covers, like you can notice above a lot more.
> >
> > In essence the problems is the fact that by no way two (or more)
> > systems can use simultaneously the same frequency, its called
> > collisions, interferences and more like you see above.
> >
> > The WORST is that the OWNER DON'T KNOW THAT HISS alarm system is no
> > longer operational, no message (20 years records hold by so called
> > experienced professionals: no RFI alarm).
> >
> > Use a wired systems and use WIRELESS only when impossible to wire, =
but
> > BE AWARE that YOUR SAFETY IS HAZARDOUS (my system was dead during =
more
> > than one year before i found out by accident and measuring the
> > wireless receiver output signal content).
> > Muzzling can occurs permanently or occasionally, mine was permanent.
> >
> > Note: So called low level mechanically (who claim them self
> > professional) try to let you believe that my system was dumb and/or
> > badly installed and they don't realize that it is an external
> > influences that can't be avoided whatever wireless alarm system you
> > have.
> > Its a pure radio communication problem know by telecommunication
> > specialists.
> > There is a way around for $$$ investments but that is out of reach =
of
> > a wireless alarm system.
> >
> > Paul
> > NOTE: My system is replaced with a wired one, do the same.
> >=20
>=20
>=20
>