| 摘要 |
An optical network is provided comprising a first node (503) and a channel drop add device (501). The first node (503) is configured to transmit data onto an optical fiber in a first line direction. The channel drop add device (501) is adapted to receive and add channels onto the optical fiber (502) thereby transmitting the data into the first and a second line direction (502a, 502b). The network further comprises a second node (507) configured to form a transmitter/receiver function. The second node is configured to receive data on said optical fiber from said first and second line directions, wherein the second node is adapted to convey data to a client interface for the data received for either said first or second line direction. The second node (507) is further configurable to transmit data into the first and second directions towards the channel add drop device using two line interfaces. The second node (507) is configured to convey data from the client interface into one direction, the active line direction, selected from said first and second directions (502a, 502b) and the second node is configured to not convey data from the client interface into the other line direction, standby line direction, selected from said first and second directions. Further, the second node (507) is adapted to synchronize received data from said first and second line directions by delaying (D) the data signals seeing the shortest delay, by a delay device. |
