发明名称 |
Digital telemetry system and method for fault detection in optical transmission system |
摘要 |
A digital telemetry system/method for locating faults in an optical transmission system including optical amplifiers, in particular optical fiber amplifiers. A supervisory codeword is applied at the transmission end of the system. At each amplifier the presence of the supervisory codeword or a distress codeword from a previous amplifier is looked for. If either codeword is detected it is relayed to the next amplifier. If neither codeword is detected a respective distress codeword is applied. At the receiver end of the system the supervisory codeword is sought or, in its absence, a distress codeword or no codeword at all and from this information the position of a system fault determined.
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申请公布号 |
US5260819(A) |
申请公布日期 |
1993.11.09 |
申请号 |
US19910715340 |
申请日期 |
1991.06.14 |
申请人 |
NORTHERN TELECOM LIMITED |
发明人 |
HADJIFOTIOU, ANAGNOSTIS;PETTITT, MARTIN J. |
分类号 |
G01M11/00;H04B10/00;H04B10/02;H04B10/08;H04B17/02;H04L1/24;(IPC1-7):H04B10/08 |
主分类号 |
G01M11/00 |
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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