JPS5242008A - Line control system for push button telephone - Google Patents

Line control system for push button telephone

Info

Publication number
JPS5242008A
JPS5242008A JP11719775A JP11719775A JPS5242008A JP S5242008 A JPS5242008 A JP S5242008A JP 11719775 A JP11719775 A JP 11719775A JP 11719775 A JP11719775 A JP 11719775A JP S5242008 A JPS5242008 A JP S5242008A
Authority
JP
Japan
Prior art keywords
control system
push button
line control
button telephone
lines
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
JP11719775A
Other languages
Japanese (ja)
Other versions
JPS5542796B2 (en
Inventor
Ichiro Taneda
Toshio Takara
Shizuo Hayashi
Shigeru Kuroyama
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.)
HASEGAWA DENKI SEISAKUSHIYO KK
HASEGAWA DENKI SEISAKUSHO
HASEGAWA DENKI SEISAKUSHO KK
Fujitsu Ltd
Original Assignee
HASEGAWA DENKI SEISAKUSHIYO KK
HASEGAWA DENKI SEISAKUSHO
HASEGAWA DENKI SEISAKUSHO KK
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 HASEGAWA DENKI SEISAKUSHIYO KK, HASEGAWA DENKI SEISAKUSHO, HASEGAWA DENKI SEISAKUSHO KK, Fujitsu Ltd filed Critical HASEGAWA DENKI SEISAKUSHIYO KK
Priority to JP11719775A priority Critical patent/JPS5242008A/en
Publication of JPS5242008A publication Critical patent/JPS5242008A/en
Publication of JPS5542796B2 publication Critical patent/JPS5542796B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/002—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems
    • H04M9/005—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems with subscriber controlled access to an exchange line
    • H04M9/006—Exchange line circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)

Abstract

PURPOSE:To remarkably reduce the number of cable core conductors by making the control lines in common use with the lamp wiring and by reducing the number of connected lines, when telephone set is connected to relay box.
JP11719775A 1975-09-30 1975-09-30 Line control system for push button telephone Granted JPS5242008A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11719775A JPS5242008A (en) 1975-09-30 1975-09-30 Line control system for push button telephone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11719775A JPS5242008A (en) 1975-09-30 1975-09-30 Line control system for push button telephone

Publications (2)

Publication Number Publication Date
JPS5242008A true JPS5242008A (en) 1977-04-01
JPS5542796B2 JPS5542796B2 (en) 1980-11-01

Family

ID=14705788

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11719775A Granted JPS5242008A (en) 1975-09-30 1975-09-30 Line control system for push button telephone

Country Status (1)

Country Link
JP (1) JPS5242008A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4949506A (en) * 1972-09-14 1974-05-14
JPS5338905A (en) * 1976-09-21 1978-04-10 Nitsuko Ltd System for controlling extension of key telephone set

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4949506A (en) * 1972-09-14 1974-05-14
JPS5338905A (en) * 1976-09-21 1978-04-10 Nitsuko Ltd System for controlling extension of key telephone set

Also Published As

Publication number Publication date
JPS5542796B2 (en) 1980-11-01

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