JPS54156407A - Information communication system - Google Patents

Information communication system

Info

Publication number
JPS54156407A
JPS54156407A JP6513678A JP6513678A JPS54156407A JP S54156407 A JPS54156407 A JP S54156407A JP 6513678 A JP6513678 A JP 6513678A JP 6513678 A JP6513678 A JP 6513678A JP S54156407 A JPS54156407 A JP S54156407A
Authority
JP
Japan
Prior art keywords
information
terminal unit
information terminal
communication
level
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
JP6513678A
Other languages
Japanese (ja)
Inventor
Shigeru Asakawa
Fumio Sugiyama
Tsukasa Okai
Makoto Nakamura
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP6513678A priority Critical patent/JPS54156407A/en
Publication of JPS54156407A publication Critical patent/JPS54156407A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/04—Control of transmission; Equalising
    • H04B3/10—Control of transmission; Equalising by pilot signal

Abstract

PURPOSE:To execute the information communication excellent stably for comparative long period, by transmitting the pilot signals different each other from the pilot signal oscillator and setting the reception signal level of the information terminal unit through the use of the automatic level set circuit. CONSTITUTION:The telephone set 11 and the information terminal unit are connected to the two wire type line via the network control unit 12, and information communication is made at the information terminal unit after line connection with the telephone set 11. In this case, between the stations in line connection, different pilot signals f1 and f2 are transmitted from the pilot signal oscillator 21 ahead the communication of the information signal, the reception signal level of the information terminal unit is set by using the automatic level set ALC circuit 18, and information communicaton is made after holding the level. Thus, excellent and stable for a comparatively long time communication for the inforamtion signal can be made.
JP6513678A 1978-05-31 1978-05-31 Information communication system Pending JPS54156407A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6513678A JPS54156407A (en) 1978-05-31 1978-05-31 Information communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6513678A JPS54156407A (en) 1978-05-31 1978-05-31 Information communication system

Publications (1)

Publication Number Publication Date
JPS54156407A true JPS54156407A (en) 1979-12-10

Family

ID=13278157

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6513678A Pending JPS54156407A (en) 1978-05-31 1978-05-31 Information communication system

Country Status (1)

Country Link
JP (1) JPS54156407A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63128857A (en) * 1986-11-19 1988-06-01 Ricoh Co Ltd Communication system for communication equipment
JPH0221853U (en) * 1988-03-22 1990-02-14
WO2023119627A1 (en) * 2021-12-24 2023-06-29 日本電信電話株式会社 Gain adjustment method, optical reception device, and computer program

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63128857A (en) * 1986-11-19 1988-06-01 Ricoh Co Ltd Communication system for communication equipment
JPH0221853U (en) * 1988-03-22 1990-02-14
WO2023119627A1 (en) * 2021-12-24 2023-06-29 日本電信電話株式会社 Gain adjustment method, optical reception device, and computer program

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