JPS55132138A - Multiplex switching unit - Google Patents

Multiplex switching unit

Info

Publication number
JPS55132138A
JPS55132138A JP3915079A JP3915079A JPS55132138A JP S55132138 A JPS55132138 A JP S55132138A JP 3915079 A JP3915079 A JP 3915079A JP 3915079 A JP3915079 A JP 3915079A JP S55132138 A JPS55132138 A JP S55132138A
Authority
JP
Japan
Prior art keywords
unit
switching
relay
switching unit
solid
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
JP3915079A
Other languages
Japanese (ja)
Other versions
JPS6249772B2 (en
Inventor
Norio Takahashi
Satoru Kosugi
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.)
NEC Corp
Original Assignee
NEC Corp
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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP3915079A priority Critical patent/JPS55132138A/en
Publication of JPS55132138A publication Critical patent/JPS55132138A/en
Publication of JPS6249772B2 publication Critical patent/JPS6249772B2/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
    • H04B1/74—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 for increasing reliability, e.g. using redundant or spare channels or apparatus

Landscapes

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

Abstract

PURPOSE:To make it possible to store and hold the operation mode of a unit all the time even in case that the power is OFF while attaining multiplex switching at a high speed by providing a nonvolatile memory method. CONSTITUTION:Switching unit 112 consists of duplex switching circuit 104, self- holding relay 110, etc., and circuit 104 judges switching on the basis of fault detection signals from duplex units 100 and 101 and then outputs of a switching request signal to cable drivers 105 and 106 and relay driver 109. In case that when the contact of relay 110 is placed at the solid-line position with unit 100 set to the operation side, the power of switching unit 112 is turned OFF, relay contacts 107 and 108 are shifted to the solid-line positions to ground unit 100 via contact 107, and then unit 100 continues to operate as the operation side.
JP3915079A 1979-03-30 1979-03-30 Multiplex switching unit Granted JPS55132138A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3915079A JPS55132138A (en) 1979-03-30 1979-03-30 Multiplex switching unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3915079A JPS55132138A (en) 1979-03-30 1979-03-30 Multiplex switching unit

Publications (2)

Publication Number Publication Date
JPS55132138A true JPS55132138A (en) 1980-10-14
JPS6249772B2 JPS6249772B2 (en) 1987-10-21

Family

ID=12545073

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3915079A Granted JPS55132138A (en) 1979-03-30 1979-03-30 Multiplex switching unit

Country Status (1)

Country Link
JP (1) JPS55132138A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62213519A (en) * 1986-03-14 1987-09-19 株式会社東芝 Source controller

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62213519A (en) * 1986-03-14 1987-09-19 株式会社東芝 Source controller

Also Published As

Publication number Publication date
JPS6249772B2 (en) 1987-10-21

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