JPS5283110A - Testing for subscriber s line - Google Patents

Testing for subscriber s line

Info

Publication number
JPS5283110A
JPS5283110A JP15856375A JP15856375A JPS5283110A JP S5283110 A JPS5283110 A JP S5283110A JP 15856375 A JP15856375 A JP 15856375A JP 15856375 A JP15856375 A JP 15856375A JP S5283110 A JPS5283110 A JP S5283110A
Authority
JP
Japan
Prior art keywords
line
subscriber
testing
switchboard
tests
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
JP15856375A
Other languages
Japanese (ja)
Other versions
JPS5714620B2 (en
Inventor
Takuji Mukaemachi
Yutaka Fukushima
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 JP15856375A priority Critical patent/JPS5283110A/en
Priority to US05/721,216 priority patent/US4076971A/en
Priority to CA260,828A priority patent/CA1054275A/en
Priority to DE19762640805 priority patent/DE2640805A1/en
Publication of JPS5283110A publication Critical patent/JPS5283110A/en
Publication of JPS5714620B2 publication Critical patent/JPS5714620B2/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)

Abstract

PURPOSE:To enable the tests with high precison and good operation by connecting a subscriber's line to the measuring circuit regardless of impedance state of the line at the switchboard with a semiconductor channel.
JP15856375A 1975-09-12 1975-12-30 Testing for subscriber s line Granted JPS5283110A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP15856375A JPS5283110A (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 (en) 1975-09-12 1976-09-10 SUBSCRIBER LINE TEST FACILITY

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15856375A JPS5283110A (en) 1975-12-30 1975-12-30 Testing for subscriber s line

Publications (2)

Publication Number Publication Date
JPS5283110A true JPS5283110A (en) 1977-07-11
JPS5714620B2 JPS5714620B2 (en) 1982-03-25

Family

ID=15674424

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15856375A Granted JPS5283110A (en) 1975-09-12 1975-12-30 Testing for subscriber s line

Country Status (1)

Country Link
JP (1) JPS5283110A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58501298A (en) * 1981-08-10 1983-08-04 ウエスタ−ン　エレクトリツク　カムパニ−，インコ−ポレ−テツド Semiconductor cross point linearization device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58501298A (en) * 1981-08-10 1983-08-04 ウエスタ−ン　エレクトリツク　カムパニ−，インコ−ポレ−テツド Semiconductor cross point linearization device

Also Published As

Publication number Publication date
JPS5714620B2 (en) 1982-03-25

Similar Documents

Publication Publication Date Title
GB1542235A (en) Test pin for testing electrical circuits
JPS5283110A (en) Testing for subscriber s line
JPS52139302A (en) Automatic circuit switching unit
JPS5396740A (en) Test system
GB635305A (en) Mounting arrangements for discharge tubes
JPS5283111A (en) Testing for subscriber s line
JPS5244673A (en) Loss angle measuring instrument
JPS5336681A (en) Experimental device for testing temperature characteristic of communication cable
JPS5223372A (en) Mintur measuring instrument
JPS51148348A (en) Input protection circuit
JPS527282A (en) Outdoor-use circuit type field measuring device
JPS52111306A (en) Testing device for subscribers circuit
CA590017A (en) Electrical testing device
JPS51144109A (en) High frequency amplifier
JPS53100865A (en) Probe
JPS5216249A (en) Test system for line and subscriber call meter
JPS5350644A (en) Active two terminal impedance circuit
CA479235A (en) Circuit testing repeating circuit breakers
JPS5310A (en) Call detector
CA480654A (en) Circuit testing repeating circuit breaker
JPS5330207A (en) Telephone exchange unit
AU157396B2 (en) 1'Telephone circuit
JPS5292411A (en) Subscriber line testing method
JPS51148316A (en) Ringing trunk
AU159914B2 (en) Multiline telephone substation instrument and circuits