JPS56154842A - Transmission system for subsignal - Google Patents

Transmission system for subsignal

Info

Publication number
JPS56154842A
JPS56154842A JP5747980A JP5747980A JPS56154842A JP S56154842 A JPS56154842 A JP S56154842A JP 5747980 A JP5747980 A JP 5747980A JP 5747980 A JP5747980 A JP 5747980A JP S56154842 A JPS56154842 A JP S56154842A
Authority
JP
Japan
Prior art keywords
signal
detector
subsignals
main
subsignal
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
JP5747980A
Other languages
Japanese (ja)
Inventor
Yoichi Matsumoto
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP5747980A priority Critical patent/JPS56154842A/en
Publication of JPS56154842A publication Critical patent/JPS56154842A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Time-Division Multiplex Systems (AREA)

Abstract

PURPOSE:To transmit subsignals, such as prearrangement telephone and monitoring control signal, by controlling gate circuits by detecting the the signal position of each subordinate station and the time of signal transmission from the output of a main signal detector. CONSTITUTION:At a subordinate station transmission side, subsignal modulator 11 which modulates a subsignal into a modulated signal is provided in addition to main signal modulator 13. At a main station reception side, on the other hand, main signal detector 19 which demodulates a received time-division multiplex signal, and gate circuits 24-27 which detect at 22 the signal position of each subordinate station and the time of signal transmission from the output detector 19 and are connected to the output side of detector 21 in parallel. On the basis of the detected signal position of each subordinate station and a selection time signal, corresponding one of circuits 24-27 is controlled to obtain subsignals of respective subordinate stations from respective gate circuits individually. Thus subsignals, such as a prearrangement telephone and monitoring control signal is transmitted easily.
JP5747980A 1980-04-30 1980-04-30 Transmission system for subsignal Pending JPS56154842A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5747980A JPS56154842A (en) 1980-04-30 1980-04-30 Transmission system for subsignal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5747980A JPS56154842A (en) 1980-04-30 1980-04-30 Transmission system for subsignal

Publications (1)

Publication Number Publication Date
JPS56154842A true JPS56154842A (en) 1981-11-30

Family

ID=13056839

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5747980A Pending JPS56154842A (en) 1980-04-30 1980-04-30 Transmission system for subsignal

Country Status (1)

Country Link
JP (1) JPS56154842A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58105442A (en) * 1981-12-16 1983-06-23 Ricoh Co Ltd Optical memory medium

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58105442A (en) * 1981-12-16 1983-06-23 Ricoh Co Ltd Optical memory medium
JPH0454299B2 (en) * 1981-12-16 1992-08-31 Ricoh Kk

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