发明名称 |
Optical repeater off-state supervisory method and device therefor |
摘要 |
An optical repeater OFF-state supervisory method includes the steps of: converting an input optical signal into an electrical signal; monitoring a level of the input optical signal from a monitored value when converted into the electrical signal; monitoring whether an input optical signal to an optical repeater is in an OFF state or not; detecting that the input optical signal has been in an OFF state; and changing the monitored value to a predetermined fixed monitored value.
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申请公布号 |
US5293260(A) |
申请公布日期 |
1994.03.08 |
申请号 |
US19910729306 |
申请日期 |
1991.07.12 |
申请人 |
FUJITSU LIMITED |
发明人 |
KIKAWA, KATSUMI;KITAMURA, MITSUO |
分类号 |
H04B3/36;H04B10/08;H04B10/16;(IPC1-7):H04B10/08;H04B10/02 |
主分类号 |
H04B3/36 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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