Active link cable diagnostics
US7769090B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 2007 |
| Grant date | Aug 3, 2010 |
| Priority date | — |
| Expiry date | Dec 31, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B3/48
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A novel apparatus for and method of estimating the cable length of an active network link. The cable diagnostics mechanism of the invention is particularly suited for use in estimating the length of Ethernet network between two edges when the link is active, i.e. data is being transmitted in both directions simultaneously and the transmission of test pulses is not possible. The cable length estimation mechanism of the present invention is based on a well-known property of the spectrum of the insertion loss of the cable, namely, the linear relationship between the attenuation of the cable at a given frequency in decibels and the cable length. Information characterizing this relationship is extracted and used to determine the length of the cable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.