JPS522110A - Calling position detecting system - Google Patents

Calling position detecting system

Info

Publication number
JPS522110A
JPS522110A JP7660475A JP7660475A JPS522110A JP S522110 A JPS522110 A JP S522110A JP 7660475 A JP7660475 A JP 7660475A JP 7660475 A JP7660475 A JP 7660475A JP S522110 A JPS522110 A JP S522110A
Authority
JP
Japan
Prior art keywords
position detecting
detecting system
calling position
calling
subscribers
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.)
Pending
Application number
JP7660475A
Other languages
Japanese (ja)
Inventor
Shiro Enami
Makoto Hisamura
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 JP7660475A priority Critical patent/JPS522110A/en
Publication of JPS522110A publication Critical patent/JPS522110A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)

Abstract

PURPOSE:To prevent erroneous ringing of a telephone by detecting a calling position of a subscriber upon sequential opening of contacts for service wires for the subscribers.
JP7660475A 1975-06-24 1975-06-24 Calling position detecting system Pending JPS522110A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7660475A JPS522110A (en) 1975-06-24 1975-06-24 Calling position detecting system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7660475A JPS522110A (en) 1975-06-24 1975-06-24 Calling position detecting system

Publications (1)

Publication Number Publication Date
JPS522110A true JPS522110A (en) 1977-01-08

Family

ID=13609924

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7660475A Pending JPS522110A (en) 1975-06-24 1975-06-24 Calling position detecting system

Country Status (1)

Country Link
JP (1) JPS522110A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5720180U (en) * 1980-07-07 1982-02-02
KR20170024024A (en) 2014-09-08 2017-03-06 가부시키가이샤 히다치 하이테크놀로지즈 Defect quantification method, defect quantification device, and defect evaluation value display device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5720180U (en) * 1980-07-07 1982-02-02
KR20170024024A (en) 2014-09-08 2017-03-06 가부시키가이샤 히다치 하이테크놀로지즈 Defect quantification method, defect quantification device, and defect evaluation value display device

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