Method and system for protecting a communication network, said communication network including a transport network

摘要: The invention relates to a system for protecting communications network comprising transport (3) and end-channel equipment (1) such as routers each connected said by connecting sections wherein protective is provided with first second systems. Said characterised in that channel between two pieces of (1), the activated when failure detected which emits direct alarm message (AU-AIS) on downstream end thereof, activated, after detection connection section it or receives indirect (AU-AIS, AU-RDI) emitted reception (AU-AIS), delay longer than (1). A protection method carried out also disclosed.