The alarm circuit had been turned off.

The machinery appeared to work fine, so the trouble had to be in the alarm circuit, here.

During the night he had decided to keep the steel mesh screens in place and their alarm circuits switched on, even by day.

Such signals may be transmitted via dedicated alarm circuits, telephone lines, or Internet.

He slammed the general alarm circuit, and across the entire camp, klaxons began to scream.

Then he began to make a complete inspection of the electromagnetic alarm circuits.

The Avenger concentrated his powers to prevent any alarm circuit from breaking, and touched the hook.

"Who besides yourself has authorization to take the alarm circuit off-line?"

It would also knock out the alarm circuit!

During the night, the alarm circuits are often wired to turn on the lights in the crew quarters.