The following illustrates the scenario where a shared pager or other notification task is blacked out for normal business hours but on call for evenings and weekends.
For the individual or group on-call this includes:
An opposite model might work for personnel working regular shifts (and who are not 'on-call' for the weekend). For that scenario, those shift rotations would have notifications 'blacked out' for the weekend but active for their normal weekday shifts.