JPS5279704A - Holding system in key telephone system - Google Patents

Holding system in key telephone system

Info

Publication number
JPS5279704A
JPS5279704A JP15672375A JP15672375A JPS5279704A JP S5279704 A JPS5279704 A JP S5279704A JP 15672375 A JP15672375 A JP 15672375A JP 15672375 A JP15672375 A JP 15672375A JP S5279704 A JPS5279704 A JP S5279704A
Authority
JP
Japan
Prior art keywords
key telephone
holding
telephone system
holding system
expenses
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
JP15672375A
Other languages
Japanese (ja)
Other versions
JPS5440402B2 (en
Inventor
Koichi Sekiguchi
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.)
Iwatsu Electric Co Ltd
Iwasaki Tsushinki KK
Original Assignee
Iwatsu Electric Co Ltd
Iwasaki Tsushinki KK
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 Iwatsu Electric Co Ltd, Iwasaki Tsushinki KK filed Critical Iwatsu Electric Co Ltd
Priority to JP15672375A priority Critical patent/JPS5279704A/en
Publication of JPS5279704A publication Critical patent/JPS5279704A/en
Priority to US05/967,017 priority patent/US4254306A/en
Publication of JPS5440402B2 publication Critical patent/JPS5440402B2/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
    • H04M9/02—Arrangements for interconnection not involving centralised switching involving a common line for all parties

Landscapes

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

Abstract

PURPOSE:To save the expenses of construction works etc. by decreasing the number of cable core conductors, by controlling the holding circuit with the use of control lines used for other objects.
JP15672375A 1975-12-26 1975-12-26 Holding system in key telephone system Granted JPS5279704A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP15672375A JPS5279704A (en) 1975-12-26 1975-12-26 Holding system in key telephone system
US05/967,017 US4254306A (en) 1975-12-26 1978-12-06 Key telephone system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15672375A JPS5279704A (en) 1975-12-26 1975-12-26 Holding system in key telephone system

Publications (2)

Publication Number Publication Date
JPS5279704A true JPS5279704A (en) 1977-07-05
JPS5440402B2 JPS5440402B2 (en) 1979-12-03

Family

ID=15633914

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15672375A Granted JPS5279704A (en) 1975-12-26 1975-12-26 Holding system in key telephone system

Country Status (1)

Country Link
JP (1) JPS5279704A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52104008A (en) * 1976-02-27 1977-09-01 Taiko Denki Seisakusho:Kk Connecting method of button telephone apparatus
JPS52120706A (en) * 1976-04-05 1977-10-11 Kanda Tsushin Kogyo Kk Improved parent-child telephone equipment
JPS5412604A (en) * 1977-06-30 1979-01-30 Tamura Electric Works Ltd Key telephone

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52104008A (en) * 1976-02-27 1977-09-01 Taiko Denki Seisakusho:Kk Connecting method of button telephone apparatus
JPS5522987B2 (en) * 1976-02-27 1980-06-20
JPS52120706A (en) * 1976-04-05 1977-10-11 Kanda Tsushin Kogyo Kk Improved parent-child telephone equipment
JPS597254B2 (en) * 1976-04-05 1984-02-17 神田通信工業株式会社 Improved parent-child telephone device
JPS5412604A (en) * 1977-06-30 1979-01-30 Tamura Electric Works Ltd Key telephone
JPS5629423B2 (en) * 1977-06-30 1981-07-08

Also Published As

Publication number Publication date
JPS5440402B2 (en) 1979-12-03

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