发明名称 |
Fault detection method and apparatus for telephone lines |
摘要 |
A method and apparatus for detecting faults on a telephone line, the method comprising: comparing measured characteristics of the line with a model, said model modeling expected characteristics of the telephone line; and in response to the comparison, generating a fault alert signal if the comparison between the measured characteristics and the modeled expected characteristics differ by more than a pre-determined threshold, wherein said characteristics comprise characteristics relating to the transmission of data on the line within a plurality of predetermined frequency bands
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申请公布号 |
US2005141673(A1) |
申请公布日期 |
2005.06.30 |
申请号 |
US20040507115 |
申请日期 |
2004.09.10 |
申请人 |
BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY |
发明人 |
LUNT NICHOLAS;BIRDSALL PAUL;BECKFORD MICHAEL W.;CHATTELL ANDREW D. |
分类号 |
H04M3/22;H04M3/08;H04M3/30;(IPC1-7):H04M1/24 |
主分类号 |
H04M3/22 |
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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