A OPTICAL FIBER LINE FAILURE PROCESSING METHOD, APPARATUS, AND SYSTEM

A method for handling a fiber line fault, a method for restoring an optical communication system on the basis of the method for handling a fiber line fault, an apparatus and an optical communication system for suppressing downstream alarms induced by a fiber line fault are provided. The embodiments of the present invention includes: loading, by a station adjacent to a failed link, an indication signal carrying alarm suppression information onto a optical signal to be output to a downstream fiber of the station upon detection of a fiber line fault; keeping in a normal working status, by a downstream station upon a receipt of the optical signal with the indication signal while the downstream station maintains normal working status. The embodiments of the present invention suppress alarms from downstream amplifier stations which are not adjacent to the failure link and further suppress APR or APSD procedures according to the alarms.