Patent ID: 11888513
Assignee: ORANGE
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 9:
10. A method of protecting a bidirectional communication of the point to point type via at least one main optical fibre between an optical line terminal, by means of at least one first optronic transceiver module, and an item of client equipment, by means of at least one second optronic transceiver module, in an optical communication network, the method comprising, implemented in the at least one first optronic transceiver module:
first supervising of the bidirectional communication via the main optical fibre by comparing the optical power received with an optical power reference value delivering a negative comparison result if the optical power received is below the optical power reference value; and
switching of the bidirectional communication to a bidirectional communication via a backup optical fibre between the first optronic transceiver module and the second optronic transceiver module if the comparison result is negative,
wherein the first supervision comprises before comparing the optical power, splitting an at least one uplink optical signal received via the main optical fibre, respectively the backup optical fibre, into a first, respectively second, low-power signal and a first, respectively second, high-power signal, and wherein the first, respectively second, low-power signal is used for comparing the optical power received with an optical power reference value, the first, respectively second, high-power signal being used for communication between the optical line terminal and the item of client equipment.