General - Security Alarms

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Edwards Systems 5721b	20 Feb 2004 22:20 GMT	6
I know this is a very old system - unfortunately, the one I have keeps intermittently showing "Power Trouble" and beeps! Does anyone know where to start checking this portion of the panel. Or better yet, anyone know where I can get the installation manual for this model?
? about a Ademco Vista SL150	20 Feb 2004 04:36 GMT	5
Is this like the Vista 20 if not what is it? The control has 8 on board zones, a 4219 8 zone expanderm, a 4286 Phone Voice unit and a wireless receiver. I am able to get into programing thru the power up mode
UPDATE: DSC 6-zone keypad - defective?	20 Feb 2004 04:10 GMT	3
[Original post was on 2-12-04] Well, I finally got to the house, entered the code in the good keypad; the red led lighted. Without disarming the system, I checked the red led at the "bad" pad and found that the red led was not on. I then
=> Quality wireless systems do they exist?	20 Feb 2004 03:21 GMT	4
Quality wireless systems do they exist? Its easy to say that the actual wireless alarm system are reliable during Radio Frequency interference (RFI) without any specification of the product data communication loop between sensors and the control
Difference between 1/4 & 1/3 format	20 Feb 2004 03:10 GMT	5
I have never used a 1/4 format color camera, however, I am considering using them on an upcoming job. If a 1/4 format is listed with a resolution of 400 lines, and the 1/3 format is listed with a resolution of 400 lines, which camera should produce the better
=> 19 Test your wireless alarm equipment on interference sensitivty	20 Feb 2004 02:03 GMT	2
The continuing ignorance of "so called pro's" about Radio Frequency Interference (RFI) and that it exist and muzzle ALL wireless alarm system, YOURS TO (even the latest product/sold systems). Nothing in a reasonable priced, battery powered general public system
1=> Unreliabel Wireless Alarm Systems	20 Feb 2004 02:03 GMT	1
Top NOTE: RFI stands for "Radio Frequency Interference" and take place when the wireless alarm system receiver receives two or more transmitted signals at the same time.
3=> What causes RFI on Wireless Alarm System, collision problems, etc..	20 Feb 2004 02:01 GMT	1
RFI stands for Radio Frequency Interference, in other words, when two (or more) simultaneous transmissions appears on the same frequency and reaches the wireless alarm radio receiver this last get confused most of the time due to what is called interference.
=> 23 ADT Frequently Asked Questions on WIRELESS..	20 Feb 2004 02:00 GMT	1
Frequently Asked Questions >Q. Are wireless systems prone to false alarms or affected by errant > radio transmissions >A. NO ( the technology today is very sophisticated.)
=> 16 What does upset Pro's? Wireless unreliability.	20 Feb 2004 02:00 GMT	1
What does upset Pro's in this news group when i say that wireless alarm systems are unreliable during RFI ? Well look at theyre childish answers (instead of providing professional arguments) they try to ridicule, mono-bit/mono-lingual
Panasonic Phone System	20 Feb 2004 01:59 GMT	1
Wondering if anyone has info or manual for a Panasonic 616 series VB-42020 phone system mike@alarmcontacts.com
=> 19 Test your wireless alarm equipment on interference sensitivty	20 Feb 2004 01:56 GMT	1
The continuing ignorance of "so called pro's" about Radio Frequency Interference (RFI) and that it exist and muzzle ALL wireless alarm system, YOURS TO (even the latest product/sold systems). Nothing in a reasonable priced, battery powered general public system
=> 13 Manufacturers have NO SPEC. on the Wireless equipment, is that normal ?	20 Feb 2004 01:36 GMT	3
Manufacturers technical specification data allow you to know the quality of the different proposed equipment's and brands. Ask for them. How can professional keep telling you that the equipment they sell is
=> 8bis Complementary information about that so called RFI detection circuit	20 Feb 2004 01:35 GMT	2
I have received following information about that manufacturer unspecified application for RFI detection. >By mister x >Every n seconds/minutes (depending on the product), the transmitter sends a
Why do pro's behave that stupid if theyre Wireless alarm system was that good?	20 Feb 2004 01:34 GMT	3
Because wireless alarm systems are bad and unreliable at will "controlled from the outside". >New NG reader, this is for you.