JPS6138890B2 - - Google Patents

Info

Publication number
JPS6138890B2
JPS6138890B2 JP393979A JP393979A JPS6138890B2 JP S6138890 B2 JPS6138890 B2 JP S6138890B2 JP 393979 A JP393979 A JP 393979A JP 393979 A JP393979 A JP 393979A JP S6138890 B2 JPS6138890 B2 JP S6138890B2
Authority
JP
Japan
Prior art keywords
transmission circuit
circuit
backup
transmission
pilot signal
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.)
Expired
Application number
JP393979A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5596739A (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
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 Nippon Electric Co Ltd filed Critical Nippon Electric Co Ltd
Priority to JP393979A priority Critical patent/JPS5596739A/ja
Publication of JPS5596739A publication Critical patent/JPS5596739A/ja
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)
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 JPS5596739A (en) 1980-07-23
JPS6138890B2 true JPS6138890B2 (enrdf_load_stackoverflow) 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 (enrdf_load_stackoverflow)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58132443U (ja) * 1982-03-02 1983-09-07 日本電気株式会社 受信機の現用予備切替回路
JPH03283722A (ja) * 1990-03-30 1991-12-13 Nec Corp 回線切替方法および装置
FR2661298B1 (fr) * 1990-04-23 1992-06-12 Cit Alcatel Procede et dispositif de retour a une liaison normale apres utilisation d'une liaison de secours dans un systeme de transmission de donnees.

Also Published As

Publication number Publication date
JPS5596739A (en) 1980-07-23

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