发明名称 |
Optisk kommunikasjonssystem |
摘要 |
Following a fault in a bidirectional optical communication system, the lasers which generate traffic-carrying channels and a supervisory channel are shut down to permit personnel to effect repairs safely. The low power supervisory channel is pulsed on at intervals to determine if the fault is still present, but if a receiver is able correctly to restore frame alignment from such a pulse, the reverse direction supervisory channel is enabled, and following frame alignment in both directions, the main lasers are safely turned on. <IMAGE> |
申请公布号 |
NO20001260(D0) |
申请公布日期 |
2000.03.10 |
申请号 |
NO20000001260 |
申请日期 |
2000.03.10 |
申请人 |
MARCONI COMMUNICATIONS LTD |
发明人 |
CALLAN, PAUL ALEXANDER;MADDOCKS, DAVID JOHN |
分类号 |
H04B10/02;H04B10/077;H04B10/08;H04J14/00;H04J14/02;(IPC1-7):H04B |
主分类号 |
H04B10/02 |
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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