Insurance "alarm sensor"/monitoring requirements?

["Bill" <bill190nospam@xxxxxxxxx>]

For a two story three bedroom home with garage door, back door, and front
door. One bedroom downstairs, two bedrooms upstairs....

For burglary, what do insurance companies require for *minimum* devices
installed to get the highest discount off your insurance. (Like all
perimeter doors have sensors, one interior motion sensor, U.L. monitoring
station???)

For fire? (minimum number of smoke detectors/heat sensors, etc., and where
installed???)