ADSL transmission in the presence of low-frequency network services
US6741604B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 1, 1999 |
| Grant date | May 25, 2004 |
| Priority date | — |
| Expiry date | Dec 1, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L5/023
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method for providing Digital Subscriber Line (DSL) service to a group of subscribers over respective subscriber loops in the presence of another, existing digital network service provided on at least some of the subscriber loops. Lower, middle and upper frequency bands are assigned for transmission over the subscriber loops, such that the existing digital network service is provided on the lower band. DSL signals are transmitted downstream on the upper band and are received upstream on the middle band, generally without transmitting or receiving DSL signals on the lower band, over those subscriber loops on which the existing digital network service, is provided. Over those subscriber loops on which the existing digital network service is not provided, the DSL signals are transmitted downstream on the lower and upper bands and are received upstream on the lower and middle bands.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.