JPS5279707A - Key telephone main unit - Google Patents

Key telephone main unit

Info

Publication number
JPS5279707A
JPS5279707A JP15672675A JP15672675A JPS5279707A JP S5279707 A JPS5279707 A JP S5279707A JP 15672675 A JP15672675 A JP 15672675A JP 15672675 A JP15672675 A JP 15672675A JP S5279707 A JPS5279707 A JP S5279707A
Authority
JP
Japan
Prior art keywords
main unit
key telephone
telephone main
asconstruction
reponse
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
JP15672675A
Other languages
Japanese (ja)
Other versions
JPS5440404B2 (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 JP15672675A priority Critical patent/JPS5279707A/en
Publication of JPS5279707A publication Critical patent/JPS5279707A/en
Priority to US05/967,017 priority patent/US4254306A/en
Publication of JPS5440404B2 publication Critical patent/JPS5440404B2/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 teh expenses such asconstruction works, by enabling the station arrival, display, reponse, communication, and outgoing thru the use of the cable core wires fewer than conventional systems.
JP15672675A 1975-12-26 1975-12-26 Key telephone main unit Granted JPS5279707A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP15672675A JPS5279707A (en) 1975-12-26 1975-12-26 Key telephone main unit
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
JP15672675A JPS5279707A (en) 1975-12-26 1975-12-26 Key telephone main unit

Publications (2)

Publication Number Publication Date
JPS5279707A true JPS5279707A (en) 1977-07-05
JPS5440404B2 JPS5440404B2 (en) 1979-12-03

Family

ID=15633978

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15672675A Granted JPS5279707A (en) 1975-12-26 1975-12-26 Key telephone main unit

Country Status (1)

Country Link
JP (1) JPS5279707A (en)

Cited By (2)

* 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
JPS53116706A (en) * 1977-03-22 1978-10-12 Tamura Electric Works Ltd Button telephone set

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS612756U (en) * 1984-06-11 1986-01-09 澤藤電機株式会社 Waterproof cover for rotating machine

Cited By (4)

* 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
JPS53116706A (en) * 1977-03-22 1978-10-12 Tamura Electric Works Ltd Button telephone set
JPS5710625B2 (en) * 1977-03-22 1982-02-27

Also Published As

Publication number Publication date
JPS5440404B2 (en) 1979-12-03

Similar Documents

Publication Publication Date Title
JPS5279707A (en) Key telephone main unit
JPS5279708A (en) Key telephone system
JPS5313806A (en) Telephone extension system
JPS5279706A (en) Subscriber line calling system in key telephone unit
JPS5279704A (en) Holding system in key telephone system
CA643317A (en) Party line telephone system
JPS5279705A (en) Privacy circuit in key telephone unit
JPS5410602A (en) Communication system for key telephone system
JPS52149409A (en) Digital data exchanging network
JPS5274201A (en) Display control circuit for key telephone system
JPS5276805A (en) Telephone service system
JPS5242009A (en) Hand free response control system
JPS5242008A (en) Line control system for push button telephone
JPS5410604A (en) Main wire holding circuit for key telephone system
JPS5234602A (en) Multiple office interphone equipment
JPS526404A (en) Calling system of the button telephone set
CA605038A (en) Party line electrical communication systems
JPS52140207A (en) Telephone service system
CA602932A (en) Telephone conference system
CA594844A (en) Telephone conference system
JPS5342508A (en) Automatic test system for telephone lines
JPS5410605A (en) Privacy system for key telephone system
CA576327A (en) Traffic supervisory arrangements in telephone systems
CA515175A (en) Party line selective signalling system having code call
CA599262A (en) Party line telephone systems