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AssigneeNEC Corporation
InventorsAtsuya Hotta, Makoto Ishiguro
Estimating the term…
An optical signal receiver is provided which is capable of making an optical signal receiver come into common and shared use even when a plurality of transmission methods is to be performed and of constructing a simplified optical transmission system. In a performance monitoring circuit, a switching control section transmits a connecting control signal to make a switching section operate so that the switching section selects a monitoring section to be connected based on bit-rate information corresponding to information about a transmission method type fed from a frequency detecting circuit and the selected monitoring section is connected to a clock/data regenerating circuit. The monitoring section extracts alarm information from a data signal fed from the clock/data regenerating circuit and transfers the alarm information to the selection connecting section. When the switching control section receives alarm information, the alarm information is transferred to devices mounted on a downstream side.
An optical signal receiver comprising:
An optical signal monitoring unit used in an optical signal receiver comprising a photoelectric converting unit to receive an optical signal containing alarm information and to convert the received optical signal into an electrical signal, a regenerating unit to regenerate a clock signal and data based on the electrical signal obtained by the photoelectric conversion in said photoelectric converting unit and to obtain a regenerated signal comprising the regenerated clock signal and the regenerated data, said optical signal monitoring unit comprising:
A method for monitoring an optical signal comprising:
An optical signal receiver comprising:
Dependencies are inferred from the claim text.