Fault isolating apparatus system and method
US4629835A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 26, 1984 |
| Grant date | Dec 16, 1986 |
| Priority date | — |
| Expiry date | Dec 26, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M3/301
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A fault isolating apparatus, system and method employing a fault isolator comprising first, second, third and fourth ports, the first and third ports being adapted to be connected to the ring and tip lines of a subscriber loop and the second and fourth ports being adapted to be connected to a subscriber location; and first and second circuit means connected between the first and second ports and the third and fourth ports, the first circuit means being adapted to block the passage of current from the first to the second port and to allow the passage of current from the second to the first port and the second circuit means being adapted to allow passage of current from the third to fourth port and to block passage of current from fourth to the third port.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.