JPS6355267B2 - - Google Patents

Info

Publication number
JPS6355267B2
JPS6355267B2 JP55036549A JP3654980A JPS6355267B2 JP S6355267 B2 JPS6355267 B2 JP S6355267B2 JP 55036549 A JP55036549 A JP 55036549A JP 3654980 A JP3654980 A JP 3654980A JP S6355267 B2 JPS6355267 B2 JP S6355267B2
Authority
JP
Japan
Prior art keywords
wire
trunk
communication path
outgoing
incoming
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
JP55036549A
Other languages
English (en)
Japanese (ja)
Other versions
JPS56132851A (en
Inventor
Kunihiko Fujiwara
Shigeru Akyama
Mutsuo Ezaka
Kozo Nakamura
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.)
Railway Technical Research Institute
Fujitsu Ltd
Original Assignee
Railway Technical Research Institute
Fujitsu 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 Railway Technical Research Institute, Fujitsu Ltd filed Critical Railway Technical Research Institute
Priority to JP3654980A priority Critical patent/JPS56132851A/ja
Publication of JPS56132851A publication Critical patent/JPS56132851A/ja
Publication of JPS6355267B2 publication Critical patent/JPS6355267B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/22—Arrangements for supervision, monitoring or testing
    • H04M3/26—Arrangements for supervision, monitoring or testing with means for applying test signals or for measuring
    • H04M3/28—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor
    • H04M3/32—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for lines between exchanges

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Exchange Systems With Centralized Control (AREA)
JP3654980A 1980-03-22 1980-03-22 Four-wire monitoring system Granted JPS56132851A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3654980A JPS56132851A (en) 1980-03-22 1980-03-22 Four-wire monitoring system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3654980A JPS56132851A (en) 1980-03-22 1980-03-22 Four-wire monitoring system

Publications (2)

Publication Number Publication Date
JPS56132851A JPS56132851A (en) 1981-10-17
JPS6355267B2 true JPS6355267B2 (enrdf_load_stackoverflow) 1988-11-01

Family

ID=12472840

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3654980A Granted JPS56132851A (en) 1980-03-22 1980-03-22 Four-wire monitoring system

Country Status (1)

Country Link
JP (1) JPS56132851A (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58168367A (ja) * 1982-03-29 1983-10-04 Fujitsu Ltd トランク監査方式

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4965715A (enrdf_load_stackoverflow) * 1972-10-25 1974-06-26
JPS5092004A (enrdf_load_stackoverflow) * 1973-12-12 1975-07-23

Also Published As

Publication number Publication date
JPS56132851A (en) 1981-10-17

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