On 04/02/2018 21:12, Bill Wright wrote:

A bellbox with a flashing LED tells a burglar that you don't have a real
alarm.

Bill

Then he finds out that he was wrong when the alarm goes off.
There are at least five alarms with flashing LEDs I can see from here
that I know are live systems.
AFAIK only one is a monitored system.

Mine doesn't have a flashing LED but it does have a red one and its not
a dummy either.