JPS5614795A - Channel system of decentralized control switchboard - Google Patents

Channel system of decentralized control switchboard

Info

Publication number
JPS5614795A
JPS5614795A JP8980879A JP8980879A JPS5614795A JP S5614795 A JPS5614795 A JP S5614795A JP 8980879 A JP8980879 A JP 8980879A JP 8980879 A JP8980879 A JP 8980879A JP S5614795 A JPS5614795 A JP S5614795A
Authority
JP
Japan
Prior art keywords
signal
sent
terminal
frame
highway
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.)
Granted
Application number
JP8980879A
Other languages
Japanese (ja)
Other versions
JPS6030143B2 (en
Inventor
Kazuhiko Hanawa
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 JP8980879A priority Critical patent/JPS6030143B2/en
Publication of JPS5614795A publication Critical patent/JPS5614795A/en
Publication of JPS6030143B2 publication Critical patent/JPS6030143B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/02—Arrangements for interconnection not involving centralised switching involving a common line for all parties
    • H04M9/022—Multiplex systems
    • H04M9/025—Time division multiplex systems, e.g. loop systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
  • Small-Scale Networks (AREA)

Abstract

PURPOSE:To detect information sent back after subtraction processing at a transmission side in terms of a sent-back frame, by receiving information from the transmission side at a reception side with an assigned frame on a highway and then by sending back information to be sent out after addition to the frame. CONSTITUTION:To make a call between terminals 41 and 42, channel CHi, for example, is assigned for a time slot. An aural signal from terminal 41 is passed through hybrid circuit 61 and then converted by A/D converter 62 into a digital signal, which is supplied to node N1. Node N1 adds signal An-1 from terminal 41 to signal Bn-2 of terminal 42 received from loop highway 12 by the previous frame and then sends the sum signal to loop highway 11. From the sum signal of channel Chi of loop highway 11, node N2 subtracts its own signal Bn-2 sent to the previous frame to receive only signal An-1. This received signal is converted by D/A converter 73 into an analog aural signal, which is sent to terminal 42 by way of hybrid circuit 71.
JP8980879A 1979-07-17 1979-07-17 Call route system in distributed control exchange Expired JPS6030143B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8980879A JPS6030143B2 (en) 1979-07-17 1979-07-17 Call route system in distributed control exchange

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8980879A JPS6030143B2 (en) 1979-07-17 1979-07-17 Call route system in distributed control exchange

Publications (2)

Publication Number Publication Date
JPS5614795A true JPS5614795A (en) 1981-02-13
JPS6030143B2 JPS6030143B2 (en) 1985-07-15

Family

ID=13981012

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8980879A Expired JPS6030143B2 (en) 1979-07-17 1979-07-17 Call route system in distributed control exchange

Country Status (1)

Country Link
JP (1) JPS6030143B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59154959U (en) * 1983-04-04 1984-10-17 アンリツ株式会社 Conference call circuit in loop transmission line
JPS61285855A (en) * 1985-06-12 1986-12-16 ノ−ザン　テレコム　リミテツド Transmitter/receiver using optical fiber communicator
JPH025652A (en) * 1988-06-22 1990-01-10 Matsushita Electric Ind Co Ltd Communication control equipment and loop type network system
JPH0280689A (en) * 1988-09-13 1990-03-20 Aikawa Tekko Kk Device for washing felt used for paper making

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59154959U (en) * 1983-04-04 1984-10-17 アンリツ株式会社 Conference call circuit in loop transmission line
JPS61285855A (en) * 1985-06-12 1986-12-16 ノ−ザン　テレコム　リミテツド Transmitter/receiver using optical fiber communicator
JPH025652A (en) * 1988-06-22 1990-01-10 Matsushita Electric Ind Co Ltd Communication control equipment and loop type network system
JPH0280689A (en) * 1988-09-13 1990-03-20 Aikawa Tekko Kk Device for washing felt used for paper making

Also Published As

Publication number Publication date
JPS6030143B2 (en) 1985-07-15

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