JPS56128089A - Hooking detection system of push-button telephone set - Google Patents

Hooking detection system of push-button telephone set

Info

Publication number
JPS56128089A
JPS56128089A JP3111780A JP3111780A JPS56128089A JP S56128089 A JPS56128089 A JP S56128089A JP 3111780 A JP3111780 A JP 3111780A JP 3111780 A JP3111780 A JP 3111780A JP S56128089 A JPS56128089 A JP S56128089A
Authority
JP
Japan
Prior art keywords
signal
push
main wire
button
depressing
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
JP3111780A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6356757B2 (enrdf_load_stackoverflow
Inventor
Mamoru Sugawara
Wataru Hyodo
Seietsu Sakamoto
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 JP3111780A priority Critical patent/JPS56128089A/ja
Publication of JPS56128089A publication Critical patent/JPS56128089A/ja
Publication of JPS6356757B2 publication Critical patent/JPS6356757B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
    • H04Q3/54—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker in which the logic circuitry controlling the exchange is centralised

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Exchange Systems With Centralized Control (AREA)
JP3111780A 1980-03-12 1980-03-12 Hooking detection system of push-button telephone set Granted JPS56128089A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3111780A JPS56128089A (en) 1980-03-12 1980-03-12 Hooking detection system of push-button telephone set

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3111780A JPS56128089A (en) 1980-03-12 1980-03-12 Hooking detection system of push-button telephone set

Publications (2)

Publication Number Publication Date
JPS56128089A true JPS56128089A (en) 1981-10-07
JPS6356757B2 JPS6356757B2 (enrdf_load_stackoverflow) 1988-11-09

Family

ID=12322454

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3111780A Granted JPS56128089A (en) 1980-03-12 1980-03-12 Hooking detection system of push-button telephone set

Country Status (1)

Country Link
JP (1) JPS56128089A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58202689A (ja) * 1982-05-21 1983-11-25 Nec Corp 押しボタンダイヤル信号の検出方式

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58202689A (ja) * 1982-05-21 1983-11-25 Nec Corp 押しボタンダイヤル信号の検出方式

Also Published As

Publication number Publication date
JPS6356757B2 (enrdf_load_stackoverflow) 1988-11-09

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