Battery-powered adapter
US5848135A · kind A · utility
2Cited by
8References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 1, 1995 |
| Grant date | Dec 8, 1998 |
| Priority date | — |
| Expiry date | Aug 1, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/0034
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A normally straight-through connection from a computer fax modem to a fax machine, or other fax sender to fax receiver, is briefly interrupted under battery power to supply the fax modem with a simulated dialtone and the fax machine with a simulated ring signal, which is supplied via a DC-to-DC converter activated by the same clock signal from which the dialtone and simulated ring signal are derived.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.