To activate on-duty phone numbers for people ensure
that the Override On duty Phones check box in the person’s General tab
is cleared. To configure on-duty phones do the following:
Go to Setup > Organization > Institution -
The first On-duty contact method encountered looking backward from
the Position is used as the suggested contact for contacting on-duty
personnel.
Go to the desired level in the organizational structure
to enter the phone number.
In Phone, enter the phone number for this location.