JPS56132851A - Four-wire monitoring system - Google Patents

Four-wire monitoring system

Info

Publication number
JPS56132851A
JPS56132851A JP3654980A JP3654980A JPS56132851A JP S56132851 A JPS56132851 A JP S56132851A JP 3654980 A JP3654980 A JP 3654980A JP 3654980 A JP3654980 A JP 3654980A JP S56132851 A JPS56132851 A JP S56132851A
Authority
JP
Japan
Prior art keywords
wire system
main channel
wire
lines
channel network
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
JP3654980A
Other languages
Japanese (ja)
Other versions
JPS6355267B2 (en
Inventor
Kunihiko Fujiwara
Shigeru Akiyama
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.)
JAPANESE NATIONAL RAILWAYS<JNR>
Fujitsu Ltd
Japan National Railways
Original Assignee
JAPANESE NATIONAL RAILWAYS<JNR>
Fujitsu Ltd
Japan National Railways
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 JAPANESE NATIONAL RAILWAYS<JNR>, Fujitsu Ltd, Japan National Railways filed Critical JAPANESE NATIONAL RAILWAYS<JNR>
Priority to JP3654980A priority Critical patent/JPS56132851A/en
Publication of JPS56132851A publication Critical patent/JPS56132851A/en
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)
  • Exchange Systems With Centralized Control (AREA)
  • Monitoring And Testing Of Exchanges (AREA)

Abstract

PURPOSE:To make it possible to monitor a four-wire relayed call which is executed through the main channel network, and economically monitor in case of a large-scale switchboard, by setting one pair of two-wire system offering lines in the two-wire system main channel of an automatic switchboard. CONSTITUTION:One pair of two-wire system connecting lines 1, 2 are cnnected to the two-wire system main channel network NW. Also, a monitor channel E and F of the monitoring console OBSD for monitoring the trunk line are connected to the two-wire system main channel network NW. In this case, when the operation for designating and connecting the outgoing trunk OGT for the four-wire system trunk line T2 is executed in the monitoring console OBSL, the two-wire system connecting line 1 and 2 which are used by the outgoing trunk OGT for 4-wire repeating in the main channel network NW are discriminated. Also, two-wire system offering lines 3, 4 to the connecting lines 1, 2 are set in the main channel network NW. Accordingly, a call which is sent from the incoming channels 11, 01 of the four-wire system trunk lines T1, T2 is monitored through the two-wire system offering channels 3, 4.
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 true JPS56132851A (en) 1981-10-17
JPS6355267B2 JPS6355267B2 (en) 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 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58168367A (en) * 1982-03-29 1983-10-04 Fujitsu Ltd Trunk service observing system

Citations (2)

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

Patent Citations (2)

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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58168367A (en) * 1982-03-29 1983-10-04 Fujitsu Ltd Trunk service observing system
JPH0316822B2 (en) * 1982-03-29 1991-03-06 Fujitsu Ltd

Also Published As

Publication number Publication date
JPS6355267B2 (en) 1988-11-01

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