Capacitance measurement-based mechanism for locating open telecommunication line fault
US6975706B1 · kind B1 · utility
8Cited by
3References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 16, 2003 |
| Grant date | Dec 13, 2005 |
| Priority date | — |
| Expiry date | Mar 2, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M3/085
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
To locate an open fault along a telecommunication wireline pair, a prescribed frequency tone is coupled to the wireline pair by way of a center tap of the transformer through which a line card is coupled to a subscriber loop. The line card's analog front end conducts capacitance to ground measurements on the tip and ring segments of the wireline pair. From these measurements, sum and difference distance values of respective tip and ring conductor lengths are derived. The sum and difference distance values are then processed to calculate the distance to the fault.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.