COMMUNICATION ROUTE CONTROL SYSTEM IN DISTRIBUTION LINE REMOTE SUPERVISORY CONTROL COMMUNICATION SYSTEM APPLIED WITH IP

PROBLEM TO BE SOLVED: To provide a communication route control system in a distribution line remote supervisory control communication system applied with an IP in which the communication route can be switched immediately without loading the protocol of STP, or the like. SOLUTION: In the communication route control system of a distribution line remote supervisory control communication system applied with IP, the transceiver SW-HUB of slave station C is loaded with transfer mode setting for transferring a frame between ports and a non-transfer mode setting not transferring a frame. Switching can be made between transfer mode setting and non-transfer mode setting depending on an instruction from a master station P. Looping of a communication route can be prevented by setting the non-transfer mode in the transceiver SW-HUB of slave station C at one of a plurality of slave stations C where the network forms a loop and constitutes ring networks A and A'. COPYRIGHT: (C)2006,JPO&NCIPI