JPS5287303A - Office line control circuit in push-phone - Google Patents

Office line control circuit in push-phone

Info

Publication number
JPS5287303A
JPS5287303A JP361576A JP361576A JPS5287303A JP S5287303 A JPS5287303 A JP S5287303A JP 361576 A JP361576 A JP 361576A JP 361576 A JP361576 A JP 361576A JP S5287303 A JPS5287303 A JP S5287303A
Authority
JP
Japan
Prior art keywords
phone
push
control circuit
line control
office line
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
JP361576A
Other languages
Japanese (ja)
Other versions
JPS5436041B2 (en
Inventor
Norihisa Hijikata
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
Original Assignee
Iwatsu Electric Co 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 Iwatsu Electric Co Ltd filed Critical Iwatsu Electric Co Ltd
Priority to JP361576A priority Critical patent/JPS5287303A/en
Publication of JPS5287303A publication Critical patent/JPS5287303A/en
Publication of JPS5436041B2 publication Critical patent/JPS5436041B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/71—Substation extension arrangements

Landscapes

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

Abstract

PURPOSE:To furnish a common family with an economical telephone system by limiting the total number of telephones to two sets without reducing the former capacity, by using cable of 4 wired core in order to connect each telephone to the central unit.
JP361576A 1976-01-14 1976-01-14 Office line control circuit in push-phone Granted JPS5287303A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP361576A JPS5287303A (en) 1976-01-14 1976-01-14 Office line control circuit in push-phone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP361576A JPS5287303A (en) 1976-01-14 1976-01-14 Office line control circuit in push-phone

Publications (2)

Publication Number Publication Date
JPS5287303A true JPS5287303A (en) 1977-07-21
JPS5436041B2 JPS5436041B2 (en) 1979-11-07

Family

ID=11562386

Family Applications (1)

Application Number Title Priority Date Filing Date
JP361576A Granted JPS5287303A (en) 1976-01-14 1976-01-14 Office line control circuit in push-phone

Country Status (1)

Country Link
JP (1) JPS5287303A (en)

Also Published As

Publication number Publication date
JPS5436041B2 (en) 1979-11-07

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