Methods and apparatuses for supervision of optical networks

(canceled)

A Central Office providing data signals over a feeder fibre to Optical Network Terminals (ONTs), in an optical communication network, the data signals being distributed to the ONTs by a Remote Node communicatively coupled to the Central Office, the Central Office being configured to enable supervision of optical fibres in the optical communication network, the Central Office comprising:

• an Optical Line Terminal (OLT) adapted to send said data signals to the ONTs via the Remote Node;
• and
• a testing unit adapted to create test signals of different monitoring wavelengths associated to predefined groups of said ONTs, each group comprising a plurality of ONTs, and to send the created test signals to the Remote Node, thereby enabling the Remote Node to route each of said test signals to a corresponding associated group of ONTs based on the wavelengths of the test signals, said monitoring wavelengths including a first component being an integer multiple of a separation parameter (nFSR) configured in the Remote Node for routing the test signals to said groups of ONTs, such that a received back-scattered and back-reflected test signal caused by a faulty optical fibre is used for identifying the faulty optical fibre based on the wavelength, including a combination of the first and a second component, of the back-scattered and back-reflected signal.

A method in a Remote Node communicatively coupled to a Central Office that provides data signals over a feeder fibre via the Remote Node to Optical Network Terminals (ONTs), in an optical communication network, the data signals being distributed to the ONTs by the Remote Node, for enabling supervision of optical fibres in the optical communication network, the method comprising:

• receiving test signals of different monitoring wavelengths associated to predefined groups of said ONTs from the Central Office, each group comprising a plurality of ONTs;
• and
• routing each of said received test signals to a corresponding associated group of ONTs according to the wavelengths of the test signals, said monitoring wavelengths including a first component being an integer multiple of a separation parameter (nFSR) configured in the Remote Node for routing the test signals to said groups of ONTS, thereby enabling the Central Office to identify a faulty optical fibre based on the wavelength, including a combination of the first and a second component, of a received back-scattered and back-reflected test signal caused by said faulty optical fibre.

A Remote Node communicatively coupled to a Central Office that provides data signals over a feeder fibre via the Remote Node to Optical Network Terminals (ONTs), in an optical communication network, the Remote Node being configured to distribute the data signals to the ONTs and to enable supervision of optical fibres in the optical communication network, the Remote Node comprising:

• a receiving unit adapted to receive test signals of different monitoring wavelengths associated to predefined groups of said ONTs from the Central Office, each group comprising a plurality of ONTs;
• and
• a routing unit adapted to route each of said received test signals to a corresponding associated group of ONTs according to the wavelengths of the test signals, said monitoring wavelengths including a first component being an integer multiple of a separation parameter (nFSR) configured in the Remote Node for routing the test signals to said groups of ONTs, thereby enabling the Central Office to identify a faulty optical fibre based on the wavelength, including a combination of the first and a second component, of a received back-scattered and back-reflected test signal caused by said faulty optical fibre.

(canceled)