Patent ID: 7355978

Claim:
A method for implementing an Operation, Administration and Maintenance (OAM) function in a telecommunication Resilient Packet Ring (RPR) network of a packet type network, wherein a plurality of RPR stations are ring connected through dual counter-rotating data flow ringlets, the ringlets comprising an outer ringlet and an inner ringlet, further wherein said OAM function is implemented through a loopback OAM procedure of a request-reply type comprising: at a RPR source station, inserting a RPR OAM loopback request packet in the RPR network; sending said RPR OAM loopback request packet to a RPR destination station, for checking reachability of the RPR destination station; at the RPR destination station, sending a RPR OAM loopback reply packet to the RPR source station upon receipt of said RPR OAM loopback request packet, wherein a ringlet path for sending said RPR OAM loopback reply packet is determined according to information available through the RPR OAM loopback request packet.