JPS5283111A - Testing for subscriber s line - Google Patents

Testing for subscriber s line

Info

Publication number
JPS5283111A
JPS5283111A JP15856475A JP15856475A JPS5283111A JP S5283111 A JPS5283111 A JP S5283111A JP 15856475 A JP15856475 A JP 15856475A JP 15856475 A JP15856475 A JP 15856475A JP S5283111 A JPS5283111 A JP S5283111A
Authority
JP
Japan
Prior art keywords
subscriber
testing
line
voltage drop
forward voltage
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
JP15856475A
Other languages
English (en)
Other versions
JPS5640542B2 (ja
Inventor
Yutaka Fukushima
Takuji Mukaemachi
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 Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP15856475A priority Critical patent/JPS5283111A/ja
Priority to US05/721,216 priority patent/US4076971A/en
Priority to CA260,828A priority patent/CA1054275A/en
Priority to DE19762640805 priority patent/DE2640805A1/de
Publication of JPS5283111A publication Critical patent/JPS5283111A/ja
Publication of JPS5640542B2 publication Critical patent/JPS5640542B2/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
    • H04M3/30—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for subscriber's lines, for the local loop

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
JP15856475A 1975-09-12 1975-12-30 Testing for subscriber s line Granted JPS5283111A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP15856475A JPS5283111A (en) 1975-12-30 1975-12-30 Testing for subscriber s line
US05/721,216 US4076971A (en) 1975-09-12 1976-09-08 Subscriber line testing system
CA260,828A CA1054275A (en) 1975-09-12 1976-09-09 Subscriber line testing system including exchange semiconductor cross point switching
DE19762640805 DE2640805A1 (de) 1975-09-12 1976-09-10 Teilnehmerleitungs-pruefeinrichtung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15856475A JPS5283111A (en) 1975-12-30 1975-12-30 Testing for subscriber s line

Publications (2)

Publication Number Publication Date
JPS5283111A true JPS5283111A (en) 1977-07-11
JPS5640542B2 JPS5640542B2 (ja) 1981-09-21

Family

ID=15674444

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15856475A Granted JPS5283111A (en) 1975-09-12 1975-12-30 Testing for subscriber s line

Country Status (1)

Country Link
JP (1) JPS5283111A (ja)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57181559A (en) * 1981-04-30 1982-11-09 Minolta Camera Co Ltd Copying device
JPS60128462A (ja) * 1983-12-15 1985-07-09 Sharp Corp 複写機

Also Published As

Publication number Publication date
JPS5640542B2 (ja) 1981-09-21

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