发明名称 |
Loop-back control apparatus for a loop network having duplicate optical fiber transmission lines |
摘要 |
A loop-back control apparatus for use in an optical fiber transmission system, wherein it is possible to compensate for faults in opto-electrical and electro-optical converters contained in the optical fiber transmission system. An electrical switch, an optical switch, and duplicate access controllers are provided, the electrical and optical switches being controlled by a control signal generator to enable selection from among the various electro-optical and opto-electrical converters in the event of fault in one of those devices.
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申请公布号 |
US4829512(A) |
申请公布日期 |
1989.05.09 |
申请号 |
US19870089457 |
申请日期 |
1987.08.26 |
申请人 |
NEC CORPORATION |
发明人 |
NAKAI, SYOICHIRO;YOSHIDA, NORIO |
分类号 |
H04B10/08;H04B10/20;H04J3/08 |
主分类号 |
H04B10/08 |
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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