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

Similar Documents

Publication Publication Date Title
JPS5434709A (en) Call interruption system in facsimile communication
JPS52130219A (en) Transmission control system for call signal
JPS54105408A (en) Switchboard signal system
JPS53140908A (en) First ringing control system in time sharing exchanger
JPS5461806A (en) Audio response unit
JPS53117922A (en) Absence reception voice answer skip system
JPS53129508A (en) Loop detection system for subscriber's line
JPS5412607A (en) Interruption connecting system
JPS56123166A (en) Switching control system
JPS554145A (en) Terminal test system
JPS5553963A (en) Transfer signal sending device
JPS5355905A (en) Automatic dialing system
JPS5737961A (en) Testing data generating equipment
JPS54149410A (en) Automatic transfer control system
JPS577687A (en) Dial pulse repeating system
JPS51111586A (en) Electron timer system (1)
JPS5347707A (en) Connection system for call path within self-group
JPS57170664A (en) Howler signal transmitting system in time division switchboard
JPS5583397A (en) Bothway collision prevention system of bothway calling trunk
JPS5627556A (en) Call transfer system
JPS53136414A (en) Sending system for subscriber's line signal
JPS54125908A (en) Re-acceptance system for holding telephone circuit
JPS52100803A (en) Call wating system
JPS5750162A (en) Incoming subscriber number identification circuit for radio telephone exchanger
JPS51150907A (en) Subsriber line signal transmission system