Method and system for negotiating transmitting and receiving modes for transmitting facsimile data via a medium having a variable data transmission time
US6160639A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 23, 1998 |
| Grant date | Dec 12, 2000 |
| Priority date | — |
| Expiry date | Sep 23, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/33323
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A communications link having a plurality of communication media is coupled between an originating facsimile machine and a terminating facsimile machine. The plurality of communication media includes a medium having a variable data transmission time followed serially by a media having a constant data transmission time. In the communication link, a transmission mode acceptance message is intercepted from an acceptance-transmitting one of the terminating and originating facsimile machines. The transmission mode acceptance message is modified to form a modified transmission mode acceptance message for increasing a maximum received data rate in the terminating facsimile machine relative to a transmit data rate in the originating facsimile machine. Thereafter, the modified transmission mode acceptance messages sent to an acceptance-receiving one of the terminating and originating facsimile machines, wherein the modified transmission mode acceptance message is part of a sequence of messages for negotiating transmitting and receiving modes in the originating and terminating facsimile machines, respectively, which sequence permits a maximum data rate in the medium having a constant data tra…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.