JPS5490904A - Multiple signal transmission system for communication path - Google Patents

Multiple signal transmission system for communication path

Info

Publication number
JPS5490904A
JPS5490904A JP15993877A JP15993877A JPS5490904A JP S5490904 A JPS5490904 A JP S5490904A JP 15993877 A JP15993877 A JP 15993877A JP 15993877 A JP15993877 A JP 15993877A JP S5490904 A JPS5490904 A JP S5490904A
Authority
JP
Japan
Prior art keywords
signal
control signal
communication
fed
circuit
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
JP15993877A
Other languages
Japanese (ja)
Inventor
Taiji Sato
Yoshiichi Sano
Takao Yamamoto
Shinichi Shibata
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 JP15993877A priority Critical patent/JPS5490904A/en
Publication of JPS5490904A publication Critical patent/JPS5490904A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/002—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems
    • H04M9/003—Transmission of control signals from or to the key telephone set; signalling equipment at key telephone set, e.g. keyboard or display equipment

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)

Abstract

PURPOSE:To smoothly transmit and receive the control signal and the communication without increasing lines, by performing ordinary transmission for communication and line selection signals and by performing multiple signal transmission for control signal. CONSTITUTION:In communication between the key telephone 1 and the main line 4, the selection switch 7 is closed. Since this signal is transmitted to the communication path cross point group 11 via the transformer 8b and the desired line is designated, it is connected to the trunk circuit 12. With this state, the control signal from the control signal generator 6 is transmitted in multiple signal and is fed to the interface circuit 8 and the relay 9. This output is fed to the neutral point of the secondary of the teansformer 8a, is delivered to the cross point group 11 as multiplex signal and is fed to the detection circuit 13 from the neutral point at the primary of the transformer 12a of the trunck circuit 12. Detection and control for the control signal such as dial signal can be made.
JP15993877A 1977-12-27 1977-12-27 Multiple signal transmission system for communication path Pending JPS5490904A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15993877A JPS5490904A (en) 1977-12-27 1977-12-27 Multiple signal transmission system for communication path

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15993877A JPS5490904A (en) 1977-12-27 1977-12-27 Multiple signal transmission system for communication path

Publications (1)

Publication Number Publication Date
JPS5490904A true JPS5490904A (en) 1979-07-19

Family

ID=15704428

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15993877A Pending JPS5490904A (en) 1977-12-27 1977-12-27 Multiple signal transmission system for communication path

Country Status (1)

Country Link
JP (1) JPS5490904A (en)

Similar Documents

Publication Publication Date Title
JPS55136742A (en) Multiplex communication system
JPS5760754A (en) Synchronizing circuit
JPS5490904A (en) Multiple signal transmission system for communication path
JPS5386502A (en) Control unit for telephone circuit netwoek
GB970315A (en) Circuit arrangement for sending and receiving code signals
JPS56149851A (en) Looplike data transmission equipment
JPS5430708A (en) Four-wire switching system
JPS5452402A (en) Data transmitter
JPS5636260A (en) Order telephone system
JPS55133157A (en) Integrated transmission system for digital line
JPS53131706A (en) Automatic telephone exchange system
JPS52123118A (en) Digital communication unit completed into duplicated reducdant circuit
JPS5455306A (en) Multi-address communication system of time-division switchboard
JPS56156064A (en) Transmitting system of interruption sound
JPS56119557A (en) Communication mode switching system
JPS5573152A (en) Optical transmitter
JPS55165059A (en) Test system for communication control unit
JPS55132144A (en) Circuit selection system for television signal
JPS5419301A (en) Transmission and reception system of signal
JPS5689191A (en) Select signal relaying system
JPS56169960A (en) Dial impulse transmitting system
JPS5413716A (en) Signal superposing circuit
JPS5436155A (en) Hybrid junction circuit
JPS5553993A (en) High multiple process pseudo call generator
JPS54111702A (en) Auxiliary communication circuit for key telephone set