JPS5575352A - Using/stand-by circuit switching system for signal transmission - Google Patents

Using/stand-by circuit switching system for signal transmission

Info

Publication number
JPS5575352A
JPS5575352A JP14786478A JP14786478A JPS5575352A JP S5575352 A JPS5575352 A JP S5575352A JP 14786478 A JP14786478 A JP 14786478A JP 14786478 A JP14786478 A JP 14786478A JP S5575352 A JPS5575352 A JP S5575352A
Authority
JP
Japan
Prior art keywords
stand
circuit
level
reception
signal transmission
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
JP14786478A
Other languages
Japanese (ja)
Other versions
JPS6138888B2 (en
Inventor
Itsuro Yamamoto
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.)
Hitachi Denshi KK
Original Assignee
Hitachi Denshi KK
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 Hitachi Denshi KK filed Critical Hitachi Denshi KK
Priority to JP14786478A priority Critical patent/JPS5575352A/en
Publication of JPS5575352A publication Critical patent/JPS5575352A/en
Publication of JPS6138888B2 publication Critical patent/JPS6138888B2/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 realize an extremely high-reliability signal transmission through automatic switching from the using circuit to the stand-by circuit in case the signal reception level of the using circuit side lowers less than the level of the stand-by circuit by a fixed level along with the reception level of the stand-by circuit kept at a level higher than the fixed value. CONSTITUTION:The transmission signals are branched into two parts at the transmission side, and these signals are transmitted at one time through the using and stand-by circuits each. On the other hand, the output levels of the channels in the using and stand-by circuits are monitored through level monitor circuits 13-1-13-n plus 14-1-14-n, and at the same time the comparison is given to the output levels through using/stand-by level comparators 15-1-15-n. And in case the reception signal level of the using circuit side lowers less than the reception level of the stand- by circuit side by a fixed level along with the reception level of the stand-by circuit kept at a level higher than the fixed value, a certain channel of whole channels are switched en bloc and automatically from the using circuit to the stand-by circuit. In such way, an extremely high-reliability signal transmission circuit can be realized.
JP14786478A 1978-12-01 1978-12-01 Using/stand-by circuit switching system for signal transmission Granted JPS5575352A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14786478A JPS5575352A (en) 1978-12-01 1978-12-01 Using/stand-by circuit switching system for signal transmission

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14786478A JPS5575352A (en) 1978-12-01 1978-12-01 Using/stand-by circuit switching system for signal transmission

Publications (2)

Publication Number Publication Date
JPS5575352A true JPS5575352A (en) 1980-06-06
JPS6138888B2 JPS6138888B2 (en) 1986-09-01

Family

ID=15439964

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14786478A Granted JPS5575352A (en) 1978-12-01 1978-12-01 Using/stand-by circuit switching system for signal transmission

Country Status (1)

Country Link
JP (1) JPS5575352A (en)

Also Published As

Publication number Publication date
JPS6138888B2 (en) 1986-09-01

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