Adam Pollak wrote:If you have the means to and the money, and if the siren is going to be regularly used as an active and meaningful warning device, I would do nothing other than radio activation or get a regular land line.
Doing any internet-based systems just adds on more and more methods of possible failure. If there is any failure along the way, there is not much that anyone will care to fix it all that fast, or even be aware of it.
If a land line goes down, the phone company is well aware of it and in addition to the phone systems having battery backups, they are also a repair priority. If you can see what the most-basic phone service you can get is, I would definitely go with that if the money is available to do so.
Agreed. the KISS rule is typically the best rule to follow in mission-critical systems, such as warning sirens.
Also, Robert, Have you tried pointing a Yagi antenna towards Denver OEM's location and getting their siren activation signals? Yagis are crazy good at direction signal pickup. Point the antenna towards your target, Hook up a scanner and a CATV/antenna amp (good from 5-900MHz with 10-20dB amplification) tune a scanner to the frequency used, and listen at test time.
Still close enough to a Fed Sig 550AT to drive out on test day: First Friday in May - 7PM!
As of April 15 2010, a certified NWS Skywarn Spotter.