Q: When do supervised devices cause a trouble signal and when do they cause a supervisory signal? If it is a supervisory signal, then why is it sometimes referred to as a supervisory alarm? A: As ...

The Internet, with its inherent capabilities and advantages, has impacted all aspects of electronic communications, including many applications in the security arena. Everyone is aware of the huge ...

Even if you're not ready to take the plunge into fire alarm system design and installation just yet, you should still know the fundamentals in order to perform emergency work. This includes knowing ...