JPS5676661A - Data transmission control circuit - Google Patents

Data transmission control circuit

Info

Publication number
JPS5676661A
JPS5676661A JP15480579A JP15480579A JPS5676661A JP S5676661 A JPS5676661 A JP S5676661A JP 15480579 A JP15480579 A JP 15480579A JP 15480579 A JP15480579 A JP 15480579A JP S5676661 A JPS5676661 A JP S5676661A
Authority
JP
Japan
Prior art keywords
output
signal
circuit
signal line
data 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
JP15480579A
Other languages
Japanese (ja)
Inventor
Katsuichi Tsunami
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP15480579A priority Critical patent/JPS5676661A/en
Publication of JPS5676661A publication Critical patent/JPS5676661A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
    • H04L25/40—Transmitting circuits; Receiving circuits
    • H04L25/45—Transmitting circuits; Receiving circuits using electronic distributors

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Communication Control (AREA)

Abstract

PURPOSE:To reduce the number of signal lines, by superimposing the signal indicating the state of the station itself to the data transmission signal line and providing the circuit detecting the status of opposing side to the reception signal line system. CONSTITUTION:When the output of a transmission buffer 24 is at low level, a signal is fed via resistor 23, signal line 16, photocoupler 9 of communication control unit 1 and signal line 17, and the inverter 12 is at high level for the output. The output of the photocoupler 9 enters a monostable circuit 11, and while a signal is fed to the circuit 11, the output is at high level. A signal is picked up from the output of the inverter 12 and the state of transmission can be known from the output of an OR circuit 13.
JP15480579A 1979-11-28 1979-11-28 Data transmission control circuit Pending JPS5676661A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15480579A JPS5676661A (en) 1979-11-28 1979-11-28 Data transmission control circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15480579A JPS5676661A (en) 1979-11-28 1979-11-28 Data transmission control circuit

Publications (1)

Publication Number Publication Date
JPS5676661A true JPS5676661A (en) 1981-06-24

Family

ID=15592266

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15480579A Pending JPS5676661A (en) 1979-11-28 1979-11-28 Data transmission control circuit

Country Status (1)

Country Link
JP (1) JPS5676661A (en)

Similar Documents

Publication Publication Date Title
JPS56149148A (en) Signal transmission system
JPS5676661A (en) Data transmission control circuit
JPS57148459A (en) Facsimile transmitter
JPS5784645A (en) By-pass circuit
JPS55154854A (en) Data communication unit
JPS5621443A (en) Transmission unit
JPS56161750A (en) Synchronizing system in telephone set
JPS55147851A (en) Communication controlling system
JPS5624848A (en) Communication control device
JPS57183154A (en) Multispeed transmission system
JPS5441002A (en) Data signal control system
JPS57194659A (en) Controlling system for transmission of information
JPS57174962A (en) Modem for two-wire type half duplex communication
JPS5739646A (en) Interruption controlling system during communication
JPS57138240A (en) Hairpin network
JPS5466009A (en) Detection system for circuit fault of two-wire communication device
JPS5715539A (en) Monitoring system for transmission system
JPS54157010A (en) Subscriber congestion detection unit
JPS5773547A (en) Remote monitor and control system
JPS54918A (en) Facsimile transmission system
JPS5480019A (en) Test method for communication circuit
JPS5294716A (en) Control system for facsimile communication, etc.
JPS5613856A (en) Signal transmitting system
JPS5676826A (en) Data transfer control system
JPS5433609A (en) Order line communication system for scpc