I'm on an oncall rotation. I get paid 1/3rd my normal salaried rate for all the time outside of normal working hours that I'm expected to be available to respo

I'm on an oncall rotation. I get paid 1/3rd my normal salaried rate for all the time outside of normal working hours that I'm expected to be available to respond to critical issues. Note that I get paid this regardless of whether there actually are critical issues. Do you have this kind of system set up? If not, do you make it clear when you're hiring people that you're expecting them to occasionally do what is effectively uncompensated oncall on nights/weekends? That's the kind of thing you have to know going in in order to be able to compare like-for-like in competing offers.