any call to a point outside the service area. (SMICO, 71: 421) Distance dialing is the completion of long distance calls by either customers or operators dialing from the originating location without , trunk call - in UK a telephone call from one telephone area to another, involving links between two trunk centres each dealing with all calls passing in or out of its area, trunk call - a telephone call to points beyond the area within which telephone calls are covered by a flat monthly rate or are charged for on a message unit basis