Technique for connecting V.34 fax machines via fax relay gateways which are not adapted to support V.34 fax modulation
US7623273B1 · kind B1 · utility
4Cited by
6References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 22, 2003 |
| Grant date | Nov 24, 2009 |
| Priority date | — |
| Expiry date | Dec 1, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/33338
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and system for connecting V.34 enabled fax machines (that is fax machines capable of operating at 33,600 bps) over network gateways that use the un-enhanced T.38 protocol, that is, gateways that have not been upgraded to handle the V.34 33,600 bps protocol in fax relay mode. When a gateway detects a V.8 protocol signal, the signal is modified so that the fax machines fall back to non V.34 protocol and operate at a slower speed which the un-enhanced T.38 gateway is capable of handling.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.