JPS637056B2 - - Google Patents

Info

Publication number
JPS637056B2
JPS637056B2 JP54030665A JP3066579A JPS637056B2 JP S637056 B2 JPS637056 B2 JP S637056B2 JP 54030665 A JP54030665 A JP 54030665A JP 3066579 A JP3066579 A JP 3066579A JP S637056 B2 JPS637056 B2 JP S637056B2
Authority
JP
Japan
Prior art keywords
signal
line
failure monitoring
transmitter
modulator
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
JP54030665A
Other languages
English (en)
Japanese (ja)
Other versions
JPS55123250A (en
Inventor
Yasushi Ichikawa
Masashi Tanaka
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 JP3066579A priority Critical patent/JPS55123250A/ja
Publication of JPS55123250A publication Critical patent/JPS55123250A/ja
Publication of JPS637056B2 publication Critical patent/JPS637056B2/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)
  • Transmitters (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
JP3066579A 1979-03-16 1979-03-16 Modulation fault supervisory system Granted JPS55123250A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3066579A JPS55123250A (en) 1979-03-16 1979-03-16 Modulation fault supervisory system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3066579A JPS55123250A (en) 1979-03-16 1979-03-16 Modulation fault supervisory system

Publications (2)

Publication Number Publication Date
JPS55123250A JPS55123250A (en) 1980-09-22
JPS637056B2 true JPS637056B2 (enrdf_load_stackoverflow) 1988-02-15

Family

ID=12310027

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3066579A Granted JPS55123250A (en) 1979-03-16 1979-03-16 Modulation fault supervisory system

Country Status (1)

Country Link
JP (1) JPS55123250A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
JPS55123250A (en) 1980-09-22

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