When I last did on call, we got $$ for the week on call, plus 4 hours TIL min for any call out,
was IT as well, so did not need to be onsite so long as we could log on within 1 hour was all good.
And laptop/phone with data meant we could do it anywhere.
and not hard to be sober enough to troubleshoot a unix box.
I used to love it as I would not budget for the cash, so was free car parts!