JPS54105408A - Switchboard signal system - Google Patents

Switchboard signal system

Info

Publication number
JPS54105408A
JPS54105408A JP1213578A JP1213578A JPS54105408A JP S54105408 A JPS54105408 A JP S54105408A JP 1213578 A JP1213578 A JP 1213578A JP 1213578 A JP1213578 A JP 1213578A JP S54105408 A JPS54105408 A JP S54105408A
Authority
JP
Japan
Prior art keywords
signal
channel
circuit
scanner
constitution
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
JP1213578A
Other languages
Japanese (ja)
Inventor
Masato Eguchi
Kenichi Ishii
Hidemitsu Kawanaka
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 JP1213578A priority Critical patent/JPS54105408A/en
Publication of JPS54105408A publication Critical patent/JPS54105408A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/60—Semi-automatic systems, i.e. in which the numerical selection of the outgoing line is under the control of an operator

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)

Abstract

PURPOSE:To simplify the constitution of a switchboard signal system which receives and transmits control information through a signal channel different from a call channel, by using a signal circuit in common. CONSTITUTION:Scanner circuit 7 selects one of #1 to #n of signal channel 2 accoding to prescribed order and connects it to common signal circuit 8 channel by channel in sequence. Exercising a supervision over channel 2, signal 8 detects a start signal and then informs scanner circuit 7 of that. As a result, scanner circuit 7 fixes the connection between signal channel 2 and signal circuit 8 at that time. Signal circuit 8 sends out an actuation and signal to signal channel 2 connected by scanner circuit 7. Then, information arriving through signal channel 2 is received and stored and after the storing, it is transferred to control circuit 6. To send out information from control circuit 6, the reverse operation to that mentioned above is performed.
JP1213578A 1978-02-06 1978-02-06 Switchboard signal system Pending JPS54105408A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1213578A JPS54105408A (en) 1978-02-06 1978-02-06 Switchboard signal system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1213578A JPS54105408A (en) 1978-02-06 1978-02-06 Switchboard signal system

Publications (1)

Publication Number Publication Date
JPS54105408A true JPS54105408A (en) 1979-08-18

Family

ID=11797072

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1213578A Pending JPS54105408A (en) 1978-02-06 1978-02-06 Switchboard signal system

Country Status (1)

Country Link
JP (1) JPS54105408A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63185149A (en) * 1987-01-27 1988-07-30 Hitachi Ltd Data transfer system
US5059041A (en) * 1989-09-12 1991-10-22 Railway Technical Research Institute Electrical insulating bearing

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4917105A (en) * 1972-05-22 1974-02-15

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4917105A (en) * 1972-05-22 1974-02-15

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63185149A (en) * 1987-01-27 1988-07-30 Hitachi Ltd Data transfer system
US5059041A (en) * 1989-09-12 1991-10-22 Railway Technical Research Institute Electrical insulating bearing

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