Homeowner Forum / Security Alarms / February 2004

looking for info good and bad on Monotronix for financing and buying our paper.
If anybody has any info please pass it on to me, and if anyone has any other
options and/or companies I can persue for financing. This is very important so
please have acurate info......thank you

You walk up to a house and you hear a voice "motion in zone 1", look
up and you see a *weather proof* motion detector, a small weather
proof speaker, and a camera.  You decide to go around the back and you
hear "motion in zone 2", etc., etc.  Full coverage all the way around.

I recently acquired a second hand DSC WLS906 900mhz smoke detector with
no install manual.  I've enrolled it, entered its zone definition, and
placement test...seems ok so far.  However when I press the test button
the detector buzzer goes off but the alarm siren doesn't.  Is ...

My wireless alarm system was "deaf" and "dead" during the use of an
FCC like authorized wireless radio "headphone", that simple...
Unfortunately this authority authorized and certified device
transmitted on the shared and not protected wireless alarm system

In testing Wireless Alarm systems for RFI, it needs to be brought to some
peoples attention (we wont point any elbows) that RFI may not always be
curable, but it is *detectable and reportable*. I install and maintain
numerous ademco panels at my place of employment and several of ...

My wireless alarm system was "deaf" and "dead" when i used a wireless
radio headphone, that simple (other transmitter sources do it to, list
provided in part 4:).
This wireless headphone story showed me "how simple it is" to have

Top NOTE:
RFI stands for "Radio Frequency Interference" and take place when two
or more transmitted signals are received at the same time by the
wireless alarm system receiver.

What type of signals are able to produce RFI (Radio Frequency
Interference) on Wireless Alarm Systems and will jeopardize they're
operation?
RF Transmitters operating:

Some pro's say that wireless alarm system are certified and due to
that Radio Frequency Interference (RFI) protected, lets put it in the
right context.
Let's show that the equipment certification process has nothing to do

Its time to give some Complementary and more detailed technical
information on the Wireless Alarm System "Data communication link
techniques" in order to clarify Radio Frequency Interference (RFI)
susceptibility of such devices.

In order to avoid confusions i like to approach some "hidden" FCC
requirements.
Why hidden?
Because they are not apparent (?) but unavoidable during the

Everybody knows that wireless alarm systems are unreliable during
Radio Frequency Interference (RFI) because the transmission path of
signals between sensors and wireless receiver is muzzled by an
external transmitter causing RFI.

Regardless of some that try to flood the fish by mentioning unrealized
performances of spread spectrum (SS) in wireless alarm systems,
regardless the invalid comparisons with military equipment, everybody
knows that wireless alarm systems are unreliable during Radio

Some pro's "think" there is nothing wrong with wireless alarm
system... for years... experience... NO WARNING.
Are they're systems still operational or just dead?
When a Radio Frequency Interference (RFI) occurs, the system is no

WIRELESS alarm systems are unreliable, regardless the brand, during
Radio Frequency Interferences (known as RFI in the radio communication
world). The week point of wireless is the transmitter / receiver link
who can be muzzled and you will not know it, its not detected.