JPS51111003A - A.c. line concentrator - Google Patents

A.c. line concentrator

Info

Publication number
JPS51111003A
JPS51111003A JP50035614A JP3561475A JPS51111003A JP S51111003 A JPS51111003 A JP S51111003A JP 50035614 A JP50035614 A JP 50035614A JP 3561475 A JP3561475 A JP 3561475A JP S51111003 A JPS51111003 A JP S51111003A
Authority
JP
Japan
Prior art keywords
line concentrator
line
carrier wave
wave signal
concentrator
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
JP50035614A
Other languages
Japanese (ja)
Inventor
Taku Kurokawa
Masujiro Matsuo
Yasuo Ishii
Shigeru Ogawa
Shunichi Ito
Daisuke Takei
Yoshio Akutsu
Norio Fujiwara
Akio Otani
Harumi Nagasawa
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.)
JAPANESE NATIONAL RAILWAYS<JNR>
Hitachi Denshi KK
Hitachi Ltd
Japan National Railways
Nippon Kokuyu Tetsudo
Original Assignee
JAPANESE NATIONAL RAILWAYS<JNR>
Hitachi Denshi KK
Hitachi Ltd
Japan National Railways
Nippon Kokuyu Tetsudo
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 JAPANESE NATIONAL RAILWAYS<JNR>, Hitachi Denshi KK, Hitachi Ltd, Japan National Railways, Nippon Kokuyu Tetsudo filed Critical JAPANESE NATIONAL RAILWAYS<JNR>
Priority to JP50035614A priority Critical patent/JPS51111003A/en
Publication of JPS51111003A publication Critical patent/JPS51111003A/en
Priority to US05/764,570 priority patent/US4112260A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)
  • Communication Control (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

PURPOSE:To provide a device wherein a carrier wave signal received by a line concentrator is fed to a cross point circuit as an AC signal without demodulation, and the incoming line and outgoing line are connected by a carrier wave signal for concentration.
JP50035614A 1975-03-26 1975-03-26 A.c. line concentrator Pending JPS51111003A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP50035614A JPS51111003A (en) 1975-03-26 1975-03-26 A.c. line concentrator
US05/764,570 US4112260A (en) 1975-03-26 1977-02-01 AC type line concentrator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP50035614A JPS51111003A (en) 1975-03-26 1975-03-26 A.c. line concentrator

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP55127217A Division JPS5816821B2 (en) 1980-09-16 1980-09-16 AC line concentrator

Publications (1)

Publication Number Publication Date
JPS51111003A true JPS51111003A (en) 1976-10-01

Family

ID=12446711

Family Applications (1)

Application Number Title Priority Date Filing Date
JP50035614A Pending JPS51111003A (en) 1975-03-26 1975-03-26 A.c. line concentrator

Country Status (1)

Country Link
JP (1) JPS51111003A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5795744A (en) * 1980-12-05 1982-06-14 Nec Corp Automatic line switching device for data communication device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4948244A (en) * 1972-09-14 1974-05-10

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4948244A (en) * 1972-09-14 1974-05-10

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5795744A (en) * 1980-12-05 1982-06-14 Nec Corp Automatic line switching device for data communication device

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