JPS5429904A - Monitor system of key telephone system - Google Patents

Monitor system of key telephone system

Info

Publication number
JPS5429904A
JPS5429904A JP9629077A JP9629077A JPS5429904A JP S5429904 A JPS5429904 A JP S5429904A JP 9629077 A JP9629077 A JP 9629077A JP 9629077 A JP9629077 A JP 9629077A JP S5429904 A JPS5429904 A JP S5429904A
Authority
JP
Japan
Prior art keywords
key telephone
monitor
telephone system
monitor system
telephone
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
JP9629077A
Other languages
Japanese (ja)
Other versions
JPS563704B2 (en
Inventor
Ichiro Taneda
Toshio Takara
Shizuo Hayashi
Katsusuke Murota
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.)
HASEGAWA DENKI SEISAKUSHO
HASEGAWA DENKI SEISAKUSHO KK
Fujitsu Ltd
Original Assignee
HASEGAWA DENKI SEISAKUSHO
HASEGAWA DENKI SEISAKUSHO KK
Fujitsu 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 HASEGAWA DENKI SEISAKUSHO, HASEGAWA DENKI SEISAKUSHO KK, Fujitsu Ltd filed Critical HASEGAWA DENKI SEISAKUSHO
Priority to JP9629077A priority Critical patent/JPS5429904A/en
Publication of JPS5429904A publication Critical patent/JPS5429904A/en
Publication of JPS563704B2 publication Critical patent/JPS563704B2/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 make other telephone sets perform only monitor by providing a monitoring switch in the telephone set.
JP9629077A 1977-08-11 1977-08-11 Monitor system of key telephone system Granted JPS5429904A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9629077A JPS5429904A (en) 1977-08-11 1977-08-11 Monitor system of key telephone system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9629077A JPS5429904A (en) 1977-08-11 1977-08-11 Monitor system of key telephone system

Publications (2)

Publication Number Publication Date
JPS5429904A true JPS5429904A (en) 1979-03-06
JPS563704B2 JPS563704B2 (en) 1981-01-27

Family

ID=14160934

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9629077A Granted JPS5429904A (en) 1977-08-11 1977-08-11 Monitor system of key telephone system

Country Status (1)

Country Link
JP (1) JPS5429904A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51141507A (en) * 1975-05-31 1976-12-06 Iwatsu Electric Co Ltd Speaker talking system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51141507A (en) * 1975-05-31 1976-12-06 Iwatsu Electric Co Ltd Speaker talking system

Also Published As

Publication number Publication date
JPS563704B2 (en) 1981-01-27

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