callback number definition
callback number means a number used by the public safety answering point to re-contact the location from which a 911 call is placed; the number may or may not be the number of the station used to originate the 911 call;
callback number means a telephone number, or other unique number or code assigned to an instrument, used by a primary public safety answering point to contact the instrument from which an incoming emergency call originates.
callback number means a number used by the public safety answering point to recontact the location from which the 911 call was placed.