Re: 2. Discover Wireless Alarm System.. >

[-pull@shoot]

On Wed, 04 May 2005 07:02:06 +0200, -pull@shoot wrote:

>
>My wireless alarm system was "deaf" and "dead" during the use of an
>FCC like authorized low range and power wireless radio "headphone",
>that simple...
>
>Unfortunately this authority authorized and certified device
>transmitted on the shared and not protected wireless alarm system
>frequency, a lot of "other" low power transmitters have the same bad
>effect.
>: It muzzle any possible incoming signals from the sensors.
>
>
>This problem is well known in telecommunication and is called "Radio
>Frequency Interference" (RFI).
> This wireless headphone story shows me how EASY and SIMPLE it is to
>have the operations of any wireless alarm system jeopardized
>completely from the outside.
> There are identifications codes present in the sensor transmissions
>but during RFI the receiver output goes bingo and the ID's are
>undecodable, the system is just useless.
> The system does no longer detected FIRE and/or INTRUSION; the
>receiver is "deaf" and "dead" on alarm giving.
>
>This is applicable to OLD and NEW equipments, the receiver is unable
>to refuse the RFI signals only and keep the sensor data, he jam
>everything even the RFI detection and alarm giving.
>
>Think it over before you keep or get a wireless alarm system.
> I know, this problem happens only to others but you..
>
>Paul