Can't they just cut the phone cable instead?
Traditionally the way this was solved for businesses was with a cellular or (before that) radio back up. My dad's photoshop/darkroom business in Miami in the 70s/80s had a radio connected alarm, but ultimately, a physical barrier (solid barred backdoor, a gate across the windows in front) was the best preventative. The pawn shop in the same strip mall wasn't so lucky: thieves used a sledge hammer to make a hole in the cinder block wall from behind while somehow avoiding setting off the shop's alarm.
I'm still trying to imagine a burglar carrying an axe to break into a house. I saw some crazy shit growing up in Miami and even I can't imagine that.