JPS55162641A - Optical transmission system - Google Patents

Optical transmission system

Info

Publication number
JPS55162641A
JPS55162641A JP7032679A JP7032679A JPS55162641A JP S55162641 A JPS55162641 A JP S55162641A JP 7032679 A JP7032679 A JP 7032679A JP 7032679 A JP7032679 A JP 7032679A JP S55162641 A JPS55162641 A JP S55162641A
Authority
JP
Japan
Prior art keywords
signal
section
multiplex
converted
digital data
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
JP7032679A
Other languages
Japanese (ja)
Inventor
Kinichi Atsuya
Tsukumo Higeta
Hajime Kakehi
Yusaku Yamada
Kunio Nozawa
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP7032679A priority Critical patent/JPS55162641A/en
Publication of JPS55162641A publication Critical patent/JPS55162641A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B14/00—Transmission systems not characterised by the medium used for transmission
    • H04B14/02—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation
    • H04B14/026—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using pulse time characteristics modulation, e.g. width, position, interval

Landscapes

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

Abstract

PURPOSE:To avoid the necessity of synchronism of switching, by transmitting digital data and call signal by means of multiplex system for analog signals. CONSTITUTION:A digital data signal is converted into an analog signal at an FS modulation section 11 and input to a multiplex section 12. A call signal is input to the multiplex section 12 directly for multiplex. The multiplex signal is in pulse modulation at a PWM or PPM modulator 13 and converted into a digital signal. This signal is converted into a photo signal at an electro-optic conversion section 14 and transmitted to an optical transmission line 15. At the reception section, the analog signal in photoelectric conversion, PWM or PPM demodulation is separated into a data signal and a call signal at a separation section 18 and the data signal is FS-modulated to be the digital data. Thus, the synchronism for switching is not required.
JP7032679A 1979-06-05 1979-06-05 Optical transmission system Pending JPS55162641A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7032679A JPS55162641A (en) 1979-06-05 1979-06-05 Optical transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7032679A JPS55162641A (en) 1979-06-05 1979-06-05 Optical transmission system

Publications (1)

Publication Number Publication Date
JPS55162641A true JPS55162641A (en) 1980-12-18

Family

ID=13428200

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7032679A Pending JPS55162641A (en) 1979-06-05 1979-06-05 Optical transmission system

Country Status (1)

Country Link
JP (1) JPS55162641A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6363227A (en) * 1986-09-03 1988-03-19 Meidensha Electric Mfg Co Ltd Protective relay system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6363227A (en) * 1986-09-03 1988-03-19 Meidensha Electric Mfg Co Ltd Protective relay system

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