JPS54139413A - Line lead-in system - Google Patents

Line lead-in system

Info

Publication number
JPS54139413A
JPS54139413A JP4655278A JP4655278A JPS54139413A JP S54139413 A JPS54139413 A JP S54139413A JP 4655278 A JP4655278 A JP 4655278A JP 4655278 A JP4655278 A JP 4655278A JP S54139413 A JPS54139413 A JP S54139413A
Authority
JP
Japan
Prior art keywords
relay
contact
circuit
line
lead
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
JP4655278A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6134309B2 (enrdf_load_stackoverflow
Inventor
Shiro Enami
Tetsuo Takeshita
Hirotoshi Shirasu
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 JP4655278A priority Critical patent/JPS54139413A/ja
Publication of JPS54139413A publication Critical patent/JPS54139413A/ja
Publication of JPS6134309B2 publication Critical patent/JPS6134309B2/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Interface Circuits In Exchanges (AREA)
JP4655278A 1978-04-21 1978-04-21 Line lead-in system Granted JPS54139413A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4655278A JPS54139413A (en) 1978-04-21 1978-04-21 Line lead-in system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4655278A JPS54139413A (en) 1978-04-21 1978-04-21 Line lead-in system

Publications (2)

Publication Number Publication Date
JPS54139413A true JPS54139413A (en) 1979-10-29
JPS6134309B2 JPS6134309B2 (enrdf_load_stackoverflow) 1986-08-07

Family

ID=12750474

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4655278A Granted JPS54139413A (en) 1978-04-21 1978-04-21 Line lead-in system

Country Status (1)

Country Link
JP (1) JPS54139413A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
JPS6134309B2 (enrdf_load_stackoverflow) 1986-08-07

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