JPS57113672A - Call control system in facsimile device or the like - Google Patents

Call control system in facsimile device or the like

Info

Publication number
JPS57113672A
JPS57113672A JP55185730A JP18573080A JPS57113672A JP S57113672 A JPS57113672 A JP S57113672A JP 55185730 A JP55185730 A JP 55185730A JP 18573080 A JP18573080 A JP 18573080A JP S57113672 A JPS57113672 A JP S57113672A
Authority
JP
Japan
Prior art keywords
busy
semi
lines
duplex
transmission
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
JP55185730A
Other languages
Japanese (ja)
Inventor
Yoshiaki Ozeki
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.)
Ricoh Co Ltd
Original Assignee
Ricoh Co 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP55185730A priority Critical patent/JPS57113672A/en
Publication of JPS57113672A publication Critical patent/JPS57113672A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Bidirectional Digital Transmission (AREA)
  • Facsimiles In General (AREA)
  • Facsimile Transmission Control (AREA)

Abstract

PURPOSE:To increase the utilizing efficiency, by conducting a correspondence through selection of semi-duplex communication mode automatically, when one line is assured out of two lines, and achieving re-dial operation automatically, when both the two lines are busy. CONSTITUTION:When a telephone line LA is busy, the busy tone is detected at a busy tone detection section 13A, a switch 21A is activated via 3-AND 18A, OR gate 19A, and a transmission MODEM6 is connected to a telephone line LB being not busy. A semi-duplex mode switching control signal S6 is given to a transmission control step control section PTCC5 to switch the transmission mode from the full-duplex to the semi-dumplex wave. If both telephone lines LA, LB are busy, the logical sum of an AND15 is established, a signal S9 is generated from an OR gate 14 and inputted to a re-dial control circuit 11. The circuit 11 outputs re-dial instruction signals S10A and S10B after 3 minutes and re-callout is made to a facsimile device.
JP55185730A 1980-12-31 1980-12-31 Call control system in facsimile device or the like Pending JPS57113672A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55185730A JPS57113672A (en) 1980-12-31 1980-12-31 Call control system in facsimile device or the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55185730A JPS57113672A (en) 1980-12-31 1980-12-31 Call control system in facsimile device or the like

Publications (1)

Publication Number Publication Date
JPS57113672A true JPS57113672A (en) 1982-07-15

Family

ID=16175847

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55185730A Pending JPS57113672A (en) 1980-12-31 1980-12-31 Call control system in facsimile device or the like

Country Status (1)

Country Link
JP (1) JPS57113672A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59174046A (en) * 1983-03-23 1984-10-02 Toshiba Corp Data transmitter
JPS60240274A (en) * 1984-05-15 1985-11-29 Fujitsu Ltd Busy state detecting system of addressed station
JPH07154573A (en) * 1994-10-24 1995-06-16 Fujitsu Ltd Facsimile equipment

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59174046A (en) * 1983-03-23 1984-10-02 Toshiba Corp Data transmitter
JPS60240274A (en) * 1984-05-15 1985-11-29 Fujitsu Ltd Busy state detecting system of addressed station
JPH0329226B2 (en) * 1984-05-15 1991-04-23 Fujitsu Ltd
JPH07154573A (en) * 1994-10-24 1995-06-16 Fujitsu Ltd Facsimile equipment

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