Patent ID: 6269083
Filing Date: 2001-07-31
Classification: H04L,H04Q

Abstract:
A communication route monitoring system for monitoring, with OAM loopback cells, a communication route in an ATM network including virtual paths or virtual channels and a plurality of communication devices for terminating or relaying the virtual paths or virtual channels, comprising:first OAM loopback cell delivering means disposed in one of the communication devices which performs a network management function, for delivering a first OAM loopback cell for confirming a communication route to a route terminal point;first returning and relaying means disposed in each of the communication devices, for returning the first OAM loopback cell upon reception of the first OAM loopback cell, together with its own location identification added thereto, to a source, and relaying the received first OAM loopback cell to a next one of the communication devices; andcommunication route recognizing means disposed in said communication device which performs the network management function, for analyzing the first OAM loopback cell returned from said first returning and relaying means to recognize a status of the communication route.