MAIN COMMUNICATION EQUIPMENT, SUBSIDIARY COMMUNICATION EQUIPMENT, ANNOUNCEMENT INSTRUCTION PROGRAM, ANNOUNCEMENT INSTRUCTION METHOD AND NETWORK SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a network system whose operability can be improved. SOLUTION: The main communication equipment of this invention, that establishes communication paths with a plurality of subsidiary communication equipment through a prescribed network, displays a plurality of choices respectively allocated to the plurality of subsidiary communication equipment, detects that an optional choice is selected among the plurality of choices, generates a control signal for operating a notifying means provided in an optional subsidiary communication equipment to notify the user of the main communication equipment of the optional sub communication equipment corresponding to the detected choice, and transmits the control signal to the optional subsidiary communication equipment through a communication path. In this case, the optional sub communication equipment receives the control signal from the main communication equipment and controls the notifying means on the basis of the control signal.