- ONCALL
- Standing by in case of emergency
- Doctor's status
- Ready in case of an emergency
- Available on short notice
- Available if needed
- Available to come to work
- Available with short notice
- Emergency contact's status, perhaps
- Standing by
- Like some doctors during the weekend
- Available for summoning
- Liable to get paged, perhaps
- Readily available
- Readily available, as a doctor
- Ready for action
- Prepared to be summoned
- Standing by, in a way
- Ready at a moment's notice
- Available, as a physician
- Available, as a doctor
- Ready to respond
- Available to work
- Reachable by 59 Across
- At the ready
- Available in emergencies
- Ready if needed
- Available for use.
- In the bullpen
- Available for duty
- At home, but available
- Like some doctors
- Available for work
- Away, but not completely off-duty
- Ready for an emergency
- Ready at any time
- Like many hospital doctors
- Reachable by pager
- Available, as for work
- Prepared to respond
- Ready to respond, as a doctor
- Ready and waiting
- Available for service
- Like some doctors and therapists
- Standing by in readiness
- Like many doctors
- Available when summoned
- Like some beeper carriers
- Beepable, as a doctor
- Like surgeons, sometimes
- Reachable
- Like many an ER surgeon
- Available by beeper
- Available, in a way
