Dsl- compatible pots line card
US6836509B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 17, 2000 |
| Grant date | Dec 28, 2004 |
| Priority date | — |
| Expiry date | Mar 19, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q1/14
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An improved plain old telephone service (POTS) line card that may be directly connected to a customer line that is also connected to a digital subscriber line access module. A second order filter is added to the front end of the POTS line card in order to attenuate XDSL signals and to lower its amplitude. A new digital signal processor (DSP) includes further low pass filtering functions, gain compensation, termination impedance compensation and balance network compensation to provide the proper balanced network as is known in current POTS cards but not provided in current XDSL services. This card may also be used alone, without a XDSL equipped line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.