Adjustable hybrid having dial tone alignment configuration
US6477250B1 · kind B1 · utility
12Cited by
23References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 20, 1999 |
| Grant date | Nov 5, 2002 |
| Priority date | — |
| Expiry date | Jul 20, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/585
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A two-wire line conditioning apparatus utilizing dial tone for alignment. Variable impedances are iteratively adjusted using a multitone calibration signal. The hybrid device filters out dial tone components in measuring the echo of the multitone signal during the variable impedance adjustment. The level of the dial tone is measured to determine the overall gain that is to be inserted on the line by the line conditioning apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.