Method and device for network protection

A line board in a telecommunications system, characterized in that the line board includes a protection switch which has at least one line driver connected to an outgoing line, at least one line receiver connected to an incoming line, a protection ring interface that includes an incoming link and an outgoing link to a protection ring, a line interface that includes said incoming and outgoing lines, a connection interface that includes said incoming and outgoing lines connected to a connection board and three switches, of which a first switch is connected to the incoming line and to the protection ring, of which a second switch is connected to the outgoing line and to the protection ring, and of which a third switch is connected to the protection ring and to the incoming and the outgoing line for re-routing of traffic.

A protection ring in a telecommunications system, characterized in that the protection ring includes at least one connection board and at least two line boards which are arranged with a protection switch that includes at least one line driver connected to an outgoing line, at least one line receiver connected to an incoming line, a protection ring interface which includes an incoming link and an outgoing link to a protection ring, a line interface which includes the aforesaid incoming and outgoing lines, a connection interface which includes said incoming and outgoing lines connected to a connection board, and three switches of which a first switch is connected to the incoming line and to the protection ring, of which a second switch is connected to the outgoing line and to the protection ring and of which a third switch is connected to the protection ring and to the incoming and outgoing line for re-routing traffic, the connection-board and one of the line boards being included in a stand-by unit, said stand-by unit together with remaining line boards is connected to each other in a ring.