A burglar alarm control panel reports to a monitoring center that smokes have been reset
Played 21 times
Uploaded by: jaybird110127
Upload date: 6/23/2024
Description:
Recently someone uploaded a recording of an alarm monitoring center device playing tones on a phone call. Years ago I recorded the alarm panel we used to have reporting that the smoke detectors had been successfully reset after a fire incident (IIRC a cooking-related setting off of a smoke detector). You hear the alarm panel dialing (some digits of the phone number bleeped out), two rings, then the monitoring center answers. It tries a few protocols before finally trying one the panel understands. The panel then sends its report (the lower tones you hear are the panel), at which point the monitoring center sends back a tiny confirmation message and waits for another signal. The panel, its report complete, hangs up instead.
Comments
Jayson Smith
I recorded it directly from the phone line using a Radio Shack phone recording control device. When an alarm system is hooked up correctly, it seizes the phone line, meaning all other phones connected to the line are effectively disconnected from the line so the alarm can use the line as long as it needs without being interrupted. This can save lives if your house catches fire while your teenager is on the phone! The kid's call gets unceremoniously disconnected so the alarm can make the call it needs. However, in this case, I just happened to have a jack which I knew was wired such that it would work despite the alarm seizing the line.
alan