JPS5625845A - Semiduplex optical relay unit - Google Patents

Semiduplex optical relay unit

Info

Publication number
JPS5625845A
JPS5625845A JP10121879A JP10121879A JPS5625845A JP S5625845 A JPS5625845 A JP S5625845A JP 10121879 A JP10121879 A JP 10121879A JP 10121879 A JP10121879 A JP 10121879A JP S5625845 A JPS5625845 A JP S5625845A
Authority
JP
Japan
Prior art keywords
relay unit
signal
light
semiduplex
optical
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
JP10121879A
Other languages
Japanese (ja)
Inventor
Kuniyoshi Konishi
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 JP10121879A priority Critical patent/JPS5625845A/en
Publication of JPS5625845A publication Critical patent/JPS5625845A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H04L5/16—Half-duplex systems; Simplex/duplex switching; Transmission of break signals non-automatically inverting the direction of transmission

Landscapes

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

Abstract

PURPOSE:To enable to insert the means preventing the deterioration of quality on the way so that the transmission line can be longer, when the semiduplex data communication channel is formed with optical fiber cable. CONSTITUTION:When light signal is incoming to the optical reception module 11a via the optical path selector 13 depending on transmission and reception from the optical fiber cable 8, the light reception module 11a generates the electric signal of TTL level. This electric signal is relayed to the light transmission module 12a with the relay unit (11a 16a 12a). On the other hand, the leading of this signal triggers the retriggerable one-shot circuit 15a and activates this. Since the period of activation is made sufficiently longer than the period of input signal, while this state is kept, the relay unit (11b 16b 12b) of other direction is made to nonoperation via the inhibiting gate 16b. After the final input signal, the inhibition of other relay units are stopped.
JP10121879A 1979-08-10 1979-08-10 Semiduplex optical relay unit Pending JPS5625845A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10121879A JPS5625845A (en) 1979-08-10 1979-08-10 Semiduplex optical relay unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10121879A JPS5625845A (en) 1979-08-10 1979-08-10 Semiduplex optical relay unit

Publications (1)

Publication Number Publication Date
JPS5625845A true JPS5625845A (en) 1981-03-12

Family

ID=14294757

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10121879A Pending JPS5625845A (en) 1979-08-10 1979-08-10 Semiduplex optical relay unit

Country Status (1)

Country Link
JP (1) JPS5625845A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4641373A (en) * 1985-02-05 1987-02-03 Westinghouse Electric Corp. T-connection fiber-optic repeater
US4648132A (en) * 1982-07-19 1987-03-03 Hitachi, Ltd. Communication control apparatus
JPH01186025A (en) * 1988-01-20 1989-07-25 Fuji Electric Co Ltd Optical signal repeater

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4648132A (en) * 1982-07-19 1987-03-03 Hitachi, Ltd. Communication control apparatus
US4641373A (en) * 1985-02-05 1987-02-03 Westinghouse Electric Corp. T-connection fiber-optic repeater
JPH01186025A (en) * 1988-01-20 1989-07-25 Fuji Electric Co Ltd Optical signal repeater

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