JPS553229A - Terminal unit for data communication - Google Patents

Terminal unit for data communication

Info

Publication number
JPS553229A
JPS553229A JP7547878A JP7547878A JPS553229A JP S553229 A JPS553229 A JP S553229A JP 7547878 A JP7547878 A JP 7547878A JP 7547878 A JP7547878 A JP 7547878A JP S553229 A JPS553229 A JP S553229A
Authority
JP
Japan
Prior art keywords
signal
circuit
transmitted
data communication
terminal unit
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
JP7547878A
Other languages
Japanese (ja)
Inventor
Manabu Seto
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP7547878A priority Critical patent/JPS553229A/en
Publication of JPS553229A publication Critical patent/JPS553229A/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
    • H04M11/066—Telephone sets adapted for data transmision

Landscapes

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

Abstract

PURPOSE:To obtain a terminal unit which is free from the error reception and can be used for the data communication or the like by connecting the reception which is capable of receiving the PB signals to be transmitted in several times and also deciding that many PB signals are correct. CONSTITUTION:With push of push-button switch 8, switch signal P is transmitted to automatic signal switch 9 to be held temporarily at FF10. The AND is secured for holding signal Q with digital clock V at AND circuit 11, and thus count signal R is generated to be sent to counter circuit 12. When circuit 12 reaches the fixed value, intermittent signal S is turned on and then off with application of signal R. With this OFF signal, counter circuit 13 is driven to start counting. When circuit 13 reaches the fixed value, circuit 12 and 13 are reset and then FF10 reset. Signal S is then transmitted to dial tone generator 14.
JP7547878A 1978-06-23 1978-06-23 Terminal unit for data communication Pending JPS553229A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7547878A JPS553229A (en) 1978-06-23 1978-06-23 Terminal unit for data communication

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7547878A JPS553229A (en) 1978-06-23 1978-06-23 Terminal unit for data communication

Publications (1)

Publication Number Publication Date
JPS553229A true JPS553229A (en) 1980-01-11

Family

ID=13577436

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7547878A Pending JPS553229A (en) 1978-06-23 1978-06-23 Terminal unit for data communication

Country Status (1)

Country Link
JP (1) JPS553229A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4488003A (en) * 1982-04-12 1984-12-11 Mitsubishi Denki Kabushiki Kaisha Data communication system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4488003A (en) * 1982-04-12 1984-12-11 Mitsubishi Denki Kabushiki Kaisha Data communication system

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