Title:
光信号受信装置、光信号監視ユニット及び光信号監視方法
Document Type and Number:
Japanese Patent JP4527575
Kind Code:
B2
Abstract:
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.
Inventors:
Hota Atsuya
Makoto Ishiguro
Makoto Ishiguro
Application Number:
JP2005082613A
Publication Date:
August 18, 2010
Filing Date:
March 22, 2005
Export Citation:
Assignee:
NEC
NEC Communication Systems, Ltd.
NEC Communication Systems, Ltd.
International Classes:
H04J14/08; H04B10/07; H04B10/077; H04B10/079; H04B10/40; H04B10/50; H04B10/524; H04B10/60; H04J3/00; H04L12/28; H04L29/08
Domestic Patent References:
| JP2002076524A | ||||
| JP2000315986A |
Foreign References:
| WO2002021732A1 |
Attorney, Agent or Firm:
Seisei Nishimura