Automatic facsimile signal analyzing apparatus for a telephone exchange system
US5726767A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jun 30, 1995 |
| Grant date | Mar 10, 1998 |
| Priority date | — |
| Expiry date | Jun 30, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/00058
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An automatic facsimile signal analyzing system includes a switch unit, a service trunk, a signal identification trunk, a facsimile communication determination unit, and a control unit. The signal identification trunk restores a facsimile control signal from a modulated and encoded facsimile signal on the set speech path and performs collection of communication state information and detection of a start of facsimile communication on the basis of the restored facsimile control signal. The facsimile communication determination unit permits an operation of the signal identification trunk when the classification result from the service trunk represents a type other than the voice signal and analyzes the communication state information from the signal identification trunk. The control unit performs switching/connection control of the switch unit, connects the service trunk and the signal identification trunk, both of which are in an idle state, to the set speech path upon setting of the speech path, disconnects the service trunk from the speech path when the classification result is output, and disconnects the signal identification trunk from the set speech path when the classification r…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.