JPS5523655A - Transmission control system for facsimile system - Google Patents

Transmission control system for facsimile system

Info

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
Application number
JP9642878A
Other languages
Japanese (ja)
Inventor
Makoto Watanabe
Yoshio Iizuka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP9642878A priority Critical patent/JPS5523655A/en
Publication of JPS5523655A publication Critical patent/JPS5523655A/en
Pending legal-status Critical Current

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
JP9642878A 1978-08-07 1978-08-07 Transmission control system for facsimile system Pending JPS5523655A (en)

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)

* Cited by examiner, † Cited by third party
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.

Patent Citations (2)

* Cited by examiner, † Cited by third party
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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