JPS5596739A - Automatic switching stand-by system - Google Patents

Automatic switching stand-by system

Info

Publication number
JPS5596739A
JPS5596739A JP393979A JP393979A JPS5596739A JP S5596739 A JPS5596739 A JP S5596739A JP 393979 A JP393979 A JP 393979A JP 393979 A JP393979 A JP 393979A JP S5596739 A JPS5596739 A JP S5596739A
Authority
JP
Japan
Prior art keywords
circuit
stand
fault
transmission
current
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
JP393979A
Other languages
Japanese (ja)
Other versions
JPS6138890B2 (en
Inventor
Tadahiko Sakabe
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 JP393979A priority Critical patent/JPS5596739A/en
Publication of JPS5596739A publication Critical patent/JPS5596739A/en
Publication of JPS6138890B2 publication Critical patent/JPS6138890B2/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 elimination, re-insertion, etc., of a pilot current needless by providing priority for the private use of a stand-by transmission circuit for current transmission circuits in the system where the fault of transmission circuits is detected to switch them to the stand-by transmission circuit. CONSTITUTION:In case that reduction of the pilot current of current transmission circuit N1 is detected by 6 to switch circuit N1 to stand-by transmission circuit NS, circuit U1 is left connected to the stand-by circuit if circuit NS is decided as fault, and this state is decided as the fault of the preceding-stage system. After that, in case that another current circuit Nn is faulty, circuit NS is surrendered to circuit Nn temporarily for the relief of circuit Nn to prefer the relief of circuit Nn. After that, in case that circuit Nn becomes normal, circuit N1 is connected to circuit NS again, and the original state is restored when the fault of the preceding- stage line is released.
JP393979A 1979-01-19 1979-01-19 Automatic switching stand-by system Granted JPS5596739A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP393979A JPS5596739A (en) 1979-01-19 1979-01-19 Automatic switching stand-by system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP393979A JPS5596739A (en) 1979-01-19 1979-01-19 Automatic switching stand-by system

Publications (2)

Publication Number Publication Date
JPS5596739A true JPS5596739A (en) 1980-07-23
JPS6138890B2 JPS6138890B2 (en) 1986-09-01

Family

ID=11571089

Family Applications (1)

Application Number Title Priority Date Filing Date
JP393979A Granted JPS5596739A (en) 1979-01-19 1979-01-19 Automatic switching stand-by system

Country Status (1)

Country Link
JP (1) JPS5596739A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58132443U (en) * 1982-03-02 1983-09-07 日本電気株式会社 Receiver working standby switching circuit
JPH03283722A (en) * 1990-03-30 1991-12-13 Nec Corp Method and apparatus for line switching
JPH04229739A (en) * 1990-04-23 1992-08-19 Alcatel Cit Method and apparatus for returning to normal link after stand-by link is used in data communication system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58132443U (en) * 1982-03-02 1983-09-07 日本電気株式会社 Receiver working standby switching circuit
JPH03283722A (en) * 1990-03-30 1991-12-13 Nec Corp Method and apparatus for line switching
JPH04229739A (en) * 1990-04-23 1992-08-19 Alcatel Cit Method and apparatus for returning to normal link after stand-by link is used in data communication system

Also Published As

Publication number Publication date
JPS6138890B2 (en) 1986-09-01

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