JPS5214304A - Inter call telephone system in button telephone system - Google Patents

Inter call telephone system in button telephone system

Info

Publication number
JPS5214304A
JPS5214304A JP9030875A JP9030875A JPS5214304A JP S5214304 A JPS5214304 A JP S5214304A JP 9030875 A JP9030875 A JP 9030875A JP 9030875 A JP9030875 A JP 9030875A JP S5214304 A JPS5214304 A JP S5214304A
Authority
JP
Japan
Prior art keywords
telephone system
inter call
button
inter
call
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
JP9030875A
Other languages
Japanese (ja)
Other versions
JPS5547783B2 (en
Inventor
Minoru Sasai
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.)
Kanda Tsushin Kogyo Co Ltd
Original Assignee
Kanda Tsushin Kogyo 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 Kanda Tsushin Kogyo Co Ltd filed Critical Kanda Tsushin Kogyo Co Ltd
Priority to JP9030875A priority Critical patent/JPS5214304A/en
Priority to US05/707,324 priority patent/US4079212A/en
Publication of JPS5214304A publication Critical patent/JPS5214304A/en
Publication of JPS5547783B2 publication Critical patent/JPS5547783B2/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:An inter call telephone system in which indoor wiring consists of talk units and 2 control lines. The wiring number are minimized by sending inter call control data to 2 talk units without influencing the telephone circuit.
JP9030875A 1975-07-23 1975-07-25 Inter call telephone system in button telephone system Granted JPS5214304A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP9030875A JPS5214304A (en) 1975-07-25 1975-07-25 Inter call telephone system in button telephone system
US05/707,324 US4079212A (en) 1975-07-23 1976-07-21 Extension telephone system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9030875A JPS5214304A (en) 1975-07-25 1975-07-25 Inter call telephone system in button telephone system

Publications (2)

Publication Number Publication Date
JPS5214304A true JPS5214304A (en) 1977-02-03
JPS5547783B2 JPS5547783B2 (en) 1980-12-02

Family

ID=13994901

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9030875A Granted JPS5214304A (en) 1975-07-23 1975-07-25 Inter call telephone system in button telephone system

Country Status (1)

Country Link
JP (1) JPS5214304A (en)

Also Published As

Publication number Publication date
JPS5547783B2 (en) 1980-12-02

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