JPS5279708A - Key telephone system - Google Patents

Key telephone system

Info

Publication number
JPS5279708A
JPS5279708A JP15672775A JP15672775A JPS5279708A JP S5279708 A JPS5279708 A JP S5279708A JP 15672775 A JP15672775 A JP 15672775A JP 15672775 A JP15672775 A JP 15672775A JP S5279708 A JPS5279708 A JP S5279708A
Authority
JP
Japan
Prior art keywords
telephone system
key telephone
thru
expenses
outgoing
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
JP15672775A
Other languages
Japanese (ja)
Other versions
JPS5440405B2 (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 JP15672775A priority Critical patent/JPS5279708A/en
Publication of JPS5279708A publication Critical patent/JPS5279708A/en
Priority to US05/967,017 priority patent/US4254306A/en
Publication of JPS5440405B2 publication Critical patent/JPS5440405B2/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 such as construction works, by enabling the station arrival, display, response communication, and outgoing, thru the use of the cable having fewer number of core wires than conventional systems.
JP15672775A 1975-12-26 1975-12-26 Key telephone system Granted JPS5279708A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP15672775A JPS5279708A (en) 1975-12-26 1975-12-26 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
JP15672775A JPS5279708A (en) 1975-12-26 1975-12-26 Key telephone system

Publications (2)

Publication Number Publication Date
JPS5279708A true JPS5279708A (en) 1977-07-05
JPS5440405B2 JPS5440405B2 (en) 1979-12-03

Family

ID=15634001

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15672775A Granted JPS5279708A (en) 1975-12-26 1975-12-26 Key telephone system

Country Status (1)

Country Link
JP (1) JPS5279708A (en)

Cited By (1)

* 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

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5051507U (en) * 1973-09-07 1975-05-19

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5051507U (en) * 1973-09-07 1975-05-19

Cited By (1)

* 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

Also Published As

Publication number Publication date
JPS5440405B2 (en) 1979-12-03

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