Patent ID: 6144633
Filing Date: 2000-11-07
Classification: H04J,H04L

Abstract:
A network, comprising:a plurality of transmission equipments;a plurality of protection lines connecting said transmission equipments to each other;a plurality of working lines connecting said transmission equipments to each other to conduct digital transmission using an overhead of transmission frames for digital transmission;each of said transmission equipments including a memory corresponding to a Network Table for each of said transmission equipments for storing information corresponding to connecting status of the network and information on failures, wherein said information is generated locally in each of said transmission equipments as derived from information contained in said overhead of transmission frames; andmeans for detecting a working failure such that when a failure occurs in at least one of the working lines, switching control information on the failure is exchanged between the transmission equipments in said network according to the information contained in the overhead within the transmission frames so as at least one of said transmission equipments is enabled to switch from one transmission line to another one based on the exchanged switching control information and on the-information stored in the Network Table.