JPS52144201A - Data communication system - Google Patents

Data communication system

Info

Publication number
JPS52144201A
JPS52144201A JP6083576A JP6083576A JPS52144201A JP S52144201 A JPS52144201 A JP S52144201A JP 6083576 A JP6083576 A JP 6083576A JP 6083576 A JP6083576 A JP 6083576A JP S52144201 A JPS52144201 A JP S52144201A
Authority
JP
Japan
Prior art keywords
communication system
data communication
facilitates
center
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.)
Granted
Application number
JP6083576A
Other languages
Japanese (ja)
Other versions
JPS562471B2 (en
Inventor
Shuichi Nozaki
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 JP6083576A priority Critical patent/JPS52144201A/en
Publication of JPS52144201A publication Critical patent/JPS52144201A/en
Publication of JPS562471B2 publication Critical patent/JPS562471B2/ja
Granted 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

Abstract

PURPOSE:To realize a circuit connection confirmation system which facilitates the terminal operator's operation by sending out various tones through the data transmission unit at the center.
JP6083576A 1976-05-26 1976-05-26 Data communication system Granted JPS52144201A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6083576A JPS52144201A (en) 1976-05-26 1976-05-26 Data communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6083576A JPS52144201A (en) 1976-05-26 1976-05-26 Data communication system

Publications (2)

Publication Number Publication Date
JPS52144201A true JPS52144201A (en) 1977-12-01
JPS562471B2 JPS562471B2 (en) 1981-01-20

Family

ID=13153805

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6083576A Granted JPS52144201A (en) 1976-05-26 1976-05-26 Data communication system

Country Status (1)

Country Link
JP (1) JPS52144201A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS545304A (en) * 1977-06-14 1979-01-16 Fujitsu Ltd Data communication control system to manual terminal
JPS5897953A (en) * 1981-12-07 1983-06-10 Nec Corp Data transmisson system of subscriber telephone circuit

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0520934Y2 (en) * 1987-07-14 1993-05-28

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS545304A (en) * 1977-06-14 1979-01-16 Fujitsu Ltd Data communication control system to manual terminal
JPS5897953A (en) * 1981-12-07 1983-06-10 Nec Corp Data transmisson system of subscriber telephone circuit
JPH021417B2 (en) * 1981-12-07 1990-01-11 Nippon Denki Kk

Also Published As

Publication number Publication date
JPS562471B2 (en) 1981-01-20

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