JPS5493311A - Detection system for subscriber call - Google Patents

Detection system for subscriber call

Info

Publication number
JPS5493311A
JPS5493311A JP15841777A JP15841777A JPS5493311A JP S5493311 A JPS5493311 A JP S5493311A JP 15841777 A JP15841777 A JP 15841777A JP 15841777 A JP15841777 A JP 15841777A JP S5493311 A JPS5493311 A JP S5493311A
Authority
JP
Japan
Prior art keywords
relay
contact
subscriber terminal
call
detection system
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
JP15841777A
Other languages
Japanese (ja)
Inventor
Hirohisa Fujiki
Eisuke Iwabuchi
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP15841777A priority Critical patent/JPS5493311A/en
Publication of JPS5493311A publication Critical patent/JPS5493311A/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 reduce the number of detectors and to enable to reduce the mounting sections, by constituting the detector that the relay is operated when call is made from a subscriber terminal, the potential at the scanning point is changed, and the scanning unit detects it. CONSTITUTION:Taking that call is made at terminal SUB2, for example among the group of subscribers SUB1...SUBn, the circuit of the relay L, cut off contact co<1>2, subscriber terminal SUB2, cut off contact co<2>3, and cell is closed, and the contact l is closed with the operation of the relay L. Then, since the potential at the scanning point SCN is changed, the scanner detects it and CPU identifies the called subscriber terminal in this group. Thus, the number of detectors can be reduced and the mounting sections can also be reduced.
JP15841777A 1977-12-30 1977-12-30 Detection system for subscriber call Pending JPS5493311A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15841777A JPS5493311A (en) 1977-12-30 1977-12-30 Detection system for subscriber call

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15841777A JPS5493311A (en) 1977-12-30 1977-12-30 Detection system for subscriber call

Publications (1)

Publication Number Publication Date
JPS5493311A true JPS5493311A (en) 1979-07-24

Family

ID=15671289

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15841777A Pending JPS5493311A (en) 1977-12-30 1977-12-30 Detection system for subscriber call

Country Status (1)

Country Link
JP (1) JPS5493311A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05344547A (en) * 1992-06-05 1993-12-24 Nec Commun Syst Ltd Call detection control system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05344547A (en) * 1992-06-05 1993-12-24 Nec Commun Syst Ltd Call detection control system

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