JPS5430708A - Four-wire switching system - Google Patents

Four-wire switching system

Info

Publication number
JPS5430708A
JPS5430708A JP9605077A JP9605077A JPS5430708A JP S5430708 A JPS5430708 A JP S5430708A JP 9605077 A JP9605077 A JP 9605077A JP 9605077 A JP9605077 A JP 9605077A JP S5430708 A JPS5430708 A JP S5430708A
Authority
JP
Japan
Prior art keywords
switching system
wire switching
transformer
wire
twowinding
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
JP9605077A
Other languages
Japanese (ja)
Other versions
JPS562834B2 (en
Inventor
Ayafumi Komatsu
Masao Ogiwara
Koichi Miyamoto
Seishiro Oguchi
Sho Mototani
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.)
Fujitsu Ltd
Hitachi Ltd
NEC Corp
Oki Electric Industry Co Ltd
NTT Inc
Original Assignee
Fujitsu Ltd
Hitachi Ltd
NEC Corp
Nippon Telegraph and Telephone Corp
Oki Electric Industry Co Ltd
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 Fujitsu Ltd, Hitachi Ltd, NEC Corp, Nippon Telegraph and Telephone Corp, Oki Electric Industry Co Ltd, Nippon Electric Co Ltd filed Critical Fujitsu Ltd
Priority to JP9605077A priority Critical patent/JPS5430708A/en
Publication of JPS5430708A publication Critical patent/JPS5430708A/en
Publication of JPS562834B2 publication Critical patent/JPS562834B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/54—Circuits using the same frequency for two directions of communication
    • H04B1/58—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)

Abstract

PURPOSE:To enable a two-wire switch frame to achieve four-wire switching which can be used combinationally for both local and toll switchboard, by forming a transmission circuit by interposing a transformer between the center tap of a twowinding transformer and the ground.
JP9605077A 1977-08-12 1977-08-12 Four-wire switching system Granted JPS5430708A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9605077A JPS5430708A (en) 1977-08-12 1977-08-12 Four-wire switching system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9605077A JPS5430708A (en) 1977-08-12 1977-08-12 Four-wire switching system

Publications (2)

Publication Number Publication Date
JPS5430708A true JPS5430708A (en) 1979-03-07
JPS562834B2 JPS562834B2 (en) 1981-01-21

Family

ID=14154627

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9605077A Granted JPS5430708A (en) 1977-08-12 1977-08-12 Four-wire switching system

Country Status (1)

Country Link
JP (1) JPS5430708A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6079065A (en) * 1983-10-06 1985-05-04 Ube Ind Ltd Soundproofing asphalt composition

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6079065A (en) * 1983-10-06 1985-05-04 Ube Ind Ltd Soundproofing asphalt composition

Also Published As

Publication number Publication date
JPS562834B2 (en) 1981-01-21

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