Apparatus for testing and sparing linecard equipment in a telecommunications exchange
US5001741A · kind A · utility
9Cited by
2References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 20, 1989 |
| Grant date | Mar 19, 1991 |
| Priority date | — |
| Expiry date | Nov 20, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M3/30
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Each wire of a subscriber's line is connected to its associated input of a subscriber's line unit by two interconnected relay contact sets. The relay contact sets are also connected to test busses. If a subscriber's line unit becomes faulty, a spare subscriber's line unit can be switched in to replace the faulty unit. The connection path is made by way of the test busses and the relay contact sets associated with the respective units. Test access paths may also be provided from the busses to the units.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.