Method And Device For Data-Flow Protection Of Optical Interface In Data Communication Equipment

A data-flow protection device of an optical interface, comprising:

• a first optical-signal duplicating unit (13), an optical power detecting module (16) and an optical-signal selecting unit (15);
• wherein
• the first optical-signal duplicating unit (13) is adapted to duplicate an optical-signal into at least two duplicated optical-signals:
• a first duplicated optical-signal and a second duplicated optical-signal, wherein an input of the first optical-signal duplicating unit (13) is connected to a source-neighboring device (10) for receiving the optical-signal, a first output of the first optical-signal duplicating unit (13) is directly connected to a first input of the optical-signal selecting unit (15), a second output of the first optical-signal duplicating unit (13) connects to an input of a protected device (11);
• the optical power detecting module (16) is adapted to detect whether optical power of an output optical-signal from the protected device (11) is lower than a preset threshold value, wherein an input of the optical power detecting module (16) is connected to the optical-signal output of the protected device (11), an output of the optical power detecting module (16) is connected to a third input of the optical-signal selecting unit (151);
• and
• the optical-signal selecting unit (15) is adapted to selecting one from the second duplicated optical-signal and the output optical-signal from the protected device (11) according to an working status signal and the detection result, wherein a first input of the optical-signal selecting unit (15) is connected to a first output of the first optical-signal duplicating unit (13), a second input of the optical-signal selecting unit (15) is connected to an output of the optical-signal from the protected device (11), a third input of the optical-signal selecting unit (15) is connected to the output of the optical power detecting module (16), a control end of the optical-signal selecting unit (15) is connected with a working status signal output of the protected device (11), an output of the optical-signal selecting unit (15) connects to a destination-neighboring device (12).