System and method for improving protocol delay tolerances
US5949861A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 13, 1998 |
| Grant date | Sep 7, 1999 |
| Priority date | — |
| Expiry date | Apr 13, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/0034
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system and method for extending the time period at which a facsimile response signal can be received before a time-out occurs without altering the underlying transmission protocol. The disclosed system and method determines a response time before which a response signal must be received by a transmitting facsimile station in order to avoid a time-out event. Before the response time arrives, the disclosed system and method generates and transmits a delay signal to the transmitting facsimile station which does not substantively interfere with ongoing communications. Instead, the delay signal causes the transmitting facsimile station to tickle an internal time-out counter which results in an extension of the response signal delay tolerance. Delay signal frames can be transmitted repeatedly to accommodate any desired time-out period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.