Has anyone heard T4 in broadband tone before? What alarm does it and how to do it

Fire Alarm General Discussion
1

Has anyone heard T4 in broadband tone before? What alarm does it and how.

2

Wheelock Eluxa horns can do it when set to the T3/T4 tone and energizing the “horn control” input on the sync module. Many standalone horns can also do T4 if they receive a coded input.

The System Sensor B200S can also do T4 if commanded by the panel, which is commonly used with addressable CO detectors.

3

Also, the ACEND horns can do it.