Technique for independent ground fault detection of multiple twisted pair telephone lines connected to a common electrical power source
US7508930B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 20, 2004 |
| Grant date | Mar 24, 2009 |
| Priority date | — |
| Expiry date | Jan 10, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M3/306
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method and apparatus detects a ground fault on a span-powered telecommunication wireline within a plurality of span-powered wireline segments, to respective ones of which DSL-Cs are coupled, so that a ground fault may be detected when power is delivered by the DSL-C over a respective wireline segment to a respective downstream functional RT. A respective DSL-C measures a first voltage across a first sense resistor representative of current flowing in a first portion of its wireline segment to the RT, and also measures a second voltage across a second sense resistor representative of current flowing in a second portion of the wireline segment from the RT. In response to a difference in the first and second voltages an output representative of a ground fault in that wireline segment is generated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.