Circa 1992: I was a reserve deputy (Fully Commissioned) in small town Oklahoma. All paid deputies but one got off shift at 2100. Dispatch phone (Before small town 911) was forwarded to Oklahoma Highway Patrol.
If a call came in, OHP phoned the "duty" deputy at his home and he was ON HIS OWN. We all monitored the radio, and he would call an unofficial "Phone Tree" (like the military call out roster) to wake a few up to monitor the radio. if someone was already awake, they would radio for him to pick them up and ride along for free.

All that said, the local sheriff told citizens that it would take at least one hour for someone to respond to any call. We often as not, knew who we were going to see and would call to see if that person had shot the bad guy already. If so we would call for an ambulance also.

Believe it or not crime really did not increase. Before budget cut, the baddies worried they MIGHT get popped. After, It was a given Farmer Brown's widow was sleeping with John Browning and the baddie's odds of survival weren't great.

Really wasn't fun going solo on a call 70 miles into the country at 0300 though.