Depending on when the building was built, they might not be required to interconnect to each other, in which case it is fine to use different brands.
I thought you were part of The Anti-Fire Alarm Trashing Police (TAFATP)…
Depending on when the building was built, they might not be required to interconnect to each other, in which case it is fine to use different brands.
I thought you were part of The Anti-Fire Alarm Trashing Police (TAFATP)…