JPS5625865A - Information transmission system - Google Patents

Information transmission system

Info

Publication number
JPS5625865A
JPS5625865A JP10072679A JP10072679A JPS5625865A JP S5625865 A JPS5625865 A JP S5625865A JP 10072679 A JP10072679 A JP 10072679A JP 10072679 A JP10072679 A JP 10072679A JP S5625865 A JPS5625865 A JP S5625865A
Authority
JP
Japan
Prior art keywords
audio
signals
information
input
switch
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
JP10072679A
Other languages
Japanese (ja)
Inventor
Tomio Kishimoto
Yuichi Sato
Kenta Yokoo
Ryoji Fukatsu
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone 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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP10072679A priority Critical patent/JPS5625865A/en
Publication of JPS5625865A publication Critical patent/JPS5625865A/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)

Abstract

PURPOSE:To perform the time sharing multiplex control of manually written information precedingly with delaying of the audio signal, and to enable simultaneous transmission of the information of manually described graph with the audio information without losing the communication quality in a short time without disconnection of head of voice. CONSTITUTION:The audio signal B from the transmitter 1 is taken as the audio signal C with a delay of time Td at the delay circuit 2 and input to the hybrid coil 3. Further, when the line switch 4 is selected at the contact a, the reception signal from the audio line 5 is fed to the receiver 6 with the coil 3 via the switch 4. Further, the transmission audio detection circuit 7 and the reception audio detection circuit 8 always monitor if the power level of transmission and reception respectively exceeds a given level, and ''1'' is output to the signals D, E when a given level is exceeded to the audio signals A and B. Further, the control circuit 9 monitors the signals D, E and when the signals D, E are ''0'', the switch 4 is switched to the contact b and the information such as manually described graph can be input to the manual graph input and output unit 11 via the MODEM 10.
JP10072679A 1979-08-09 1979-08-09 Information transmission system Pending JPS5625865A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10072679A JPS5625865A (en) 1979-08-09 1979-08-09 Information transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10072679A JPS5625865A (en) 1979-08-09 1979-08-09 Information transmission system

Publications (1)

Publication Number Publication Date
JPS5625865A true JPS5625865A (en) 1981-03-12

Family

ID=14281616

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10072679A Pending JPS5625865A (en) 1979-08-09 1979-08-09 Information transmission system

Country Status (1)

Country Link
JP (1) JPS5625865A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5084103A (en) * 1973-11-27 1975-07-07

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5084103A (en) * 1973-11-27 1975-07-07

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