Wireless paging system interfering in wired fire alarm devices

I’m new to the forum. Has anyone come across this ?
Customer has a wired fire alarm system and recently installed new wireless paging system.
This is an intermitant problem with detectors going into and out of trouble.
We have replaced detectors with no success.
Manufacturer suggests interference from wireless paging system.


Do you have more details (e.g. manufacturers/models/details about the setup)?

I’ve seen warnings about things like this before.

If you’re in the US, also consider reporting this to the CPSC at https://www.saferproducts.gov/