JPS5523655A - Transmission control system for facsimile system - Google Patents
Transmission control system for facsimile systemInfo
- Publication number
- JPS5523655A JPS5523655A JP9642878A JP9642878A JPS5523655A JP S5523655 A JPS5523655 A JP S5523655A JP 9642878 A JP9642878 A JP 9642878A JP 9642878 A JP9642878 A JP 9642878A JP S5523655 A JPS5523655 A JP S5523655A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- transmission
- sqd
- given time
- speed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
PURPOSE: To enable to match the transmission speed between transmission and reception simply, by selecting the transmission speed at the transmission side when the response signal based on the quality of transmission at the reception side is absent within a given time.
CONSTITUTION: When the transmission request signal RS is ON for a given time from the control section 21 at the transmission side, the carrier transmission signal CS is transmitted via the modulator 3 after the training by carrier. At the reception side, the signal quality detection signal SQD being the equalized output of the equalizer 52 to the training signal is monitored for a given time with the signal CD detecting carrier at the demodulator 42. In this case, if the transmission quality is deteriorated and the transmission speed is not matched, no response signal is returned since unstable waveform is shown. At the transmission side, if no response is present for a given time, the transmission speed is selected to lower speed and the signal RS is again turned on. At the reception side, if the signals CD and SQD are both ON and the signal SQD has stable waveform, the response signal is returned in thr form of RS and CS. At the transmission side, the CS signal at the reception side and if the signal CD and SQD are stable, the video signal is transmitted.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9642878A JPS5523655A (en) | 1978-08-07 | 1978-08-07 | Transmission control system for facsimile system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9642878A JPS5523655A (en) | 1978-08-07 | 1978-08-07 | Transmission control system for facsimile system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5523655A true JPS5523655A (en) | 1980-02-20 |
Family
ID=14164713
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9642878A Pending JPS5523655A (en) | 1978-08-07 | 1978-08-07 | Transmission control system for facsimile system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5523655A (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50123216A (en) * | 1974-03-16 | 1975-09-27 | ||
JPS5294716A (en) * | 1976-02-04 | 1977-08-09 | Matsushita Electric Ind Co Ltd | Control system for facsimile communication, etc. |
-
1978
- 1978-08-07 JP JP9642878A patent/JPS5523655A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50123216A (en) * | 1974-03-16 | 1975-09-27 | ||
JPS5294716A (en) * | 1976-02-04 | 1977-08-09 | Matsushita Electric Ind Co Ltd | Control system for facsimile communication, etc. |
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