Patent ID: 7266115

Claim:
An access control apparatus including: a conversion table; and two or more information communication system (ICS) logical terminals for inputting/outputting an external ICS user frame, said ICS logical terminals being connected to an internal communication line, wherein: said conversion table includes information to form ICS logical terminal discriminating information and information to define a transmitting priority degree; and said access control apparatus, as a sending side access control apparatus, is operable to form an internal ICS network frame including receiving side ICS logical terminal discriminating information based on an inputted external ICS user frame and said conversion table, determine a transmitting order to transmit the inputted internal ICS network frame to the communication line based on the information to define a transmitting priority degree included in said conversion table, and control a transmitting order of the internal ICS network frame by transmitting the ICS network frame to the internal communication line according to the determined transmitting order.