Through with the switching office which is provided on the root between arrival and departure station and each arrival and departure

摘要

PROBLEM TO BE SOLVED: To provide a communication relief method by which communication on the occurrence of a fault can quickly be restored, pressing of a current ATM connection onto a band can be suppressed, and a band of a bypass ATM connection can surely be reserved.;SOLUTION: A current ATM connection setting section 25 of a transmission reception station 20a-1 sets a current ATM connection, on the basis of a setup request signal from a received terminal 10a and a setup reply signal and outputs a current ATM connection setting section to a bypass ATM connection setting section 23. The bypass ATM connection setting section 23 uses a routing management section 22 to transmit a VPI and a VCI, whose route is other than that set with the current ATM connection 41 and that can set to a route 40 leading to a transmission reception station 20 to set bypass object ATM connections 42a, 42b to a transmission reception station 20b-1. The set bypass object ATM connection 42 is used, in place of the current ATM connection, to save the communication on the occurrence of a fault in the current ATM connection 41.;COPYRIGHT: (C)2002,JPO