Metallic testing of a subscriber loop that provides both voice and digital subscriber line services
US6496566B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 29, 2000 |
| Grant date | Dec 17, 2002 |
| Priority date | — |
| Expiry date | Feb 14, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M3/2209
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Metallic testing of a subscriber loop that provides voice and DSL services is provided by a voice switch and DSL services, each of which includes a metallic test unit. A voice line card has a connection to a first metallic test bus connected to the voice switch metallic test unit via a first relay set configured to connect the metallic test bus to the subscriber loop and to disconnect the subscriber loop from the line card during testing. The DSL line card has a connection to a second metallic test bus, which is also connected to the DSLAM metallic test unit, and to the subscriber loop. A second set of relays control the connection of the metallic test bus to the line card to the subscriber loop. A signal is sent from either metallic test unit to cause the relays to change to provide a clear path for metallic testing from DC to light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.