ELECTRONIC DEVICE WITH EXCLUSIVE CONTROL TYPE COMMUNICATION FUNCTION AND ITS COMMUNICATION SYSTEM

In a communication system including a plurality of electronic communication devices connected to a common transmission line, each of the electronic communication devices includes a communication section and at least one control section, wherein the control section establishes a logical communication channel on the common transmission line to perform communication therethrough between a control section of an electronic communication device and one or more control sections of another electronic communication device, and wherein it is made possible for the control section to reject a request for establishing a separate logical communication channel issued thereto by any other control section which has no relation to the logical communication channel which has already been established. Thus, the communication system is constructed to enable efficient mutual communication to be performed between the control sections.