"Rate adaptaptive subscriber line (""RADSL"") modem and method of operation"
US5805669A · kind A · utility
65Cited by
4References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 15, 1997 |
| Grant date | Sep 8, 1998 |
| Priority date | — |
| Expiry date | Jan 15, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/20
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Existing customer premises wiring can be used with high speed digital modems, such as RADSL modems by using POTS filters in line with each piece of PSTN equipment. Alternatively, an RADSL modem includes a line monitor which detects when a piece of PSTN equipment experiences a hook-switch transition. Upon that occurrence, the error detection circuitry in the RADSL modem is disabled for a time period sufficient to avoid the counting (with associated RADSL modem rate change) of any burst errors associated with the PSTN equipment going off-hook or on-hook.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.