JPS5970344A - ボタン電話装置 - Google Patents

ボタン電話装置

Info

Publication number
JPS5970344A
JPS5970344A JP18116282A JP18116282A JPS5970344A JP S5970344 A JPS5970344 A JP S5970344A JP 18116282 A JP18116282 A JP 18116282A JP 18116282 A JP18116282 A JP 18116282A JP S5970344 A JPS5970344 A JP S5970344A
Authority
JP
Japan
Prior art keywords
voltage
circuit
button
signal
transistor
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
JP18116282A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0113797B2 (enrdf_load_stackoverflow
Inventor
Tomio Nishimura
西村　富夫
Junzo Kikuchi
菊地　純三
Ryuzo Sugiura
杉浦　隆三
Toshiro Yoshida
吉田　敏郎
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.)
Tamura Electric Works Ltd
Original Assignee
Tamura Electric Works 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 Tamura Electric Works Ltd filed Critical Tamura Electric Works Ltd
Priority to JP18116282A priority Critical patent/JPS5970344A/ja
Publication of JPS5970344A publication Critical patent/JPS5970344A/ja
Publication of JPH0113797B2 publication Critical patent/JPH0113797B2/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
    • H04M9/002—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems
    • H04M9/003—Transmission of control signals from or to the key telephone set; signalling equipment at key telephone set, e.g. keyboard or display equipment

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
JP18116282A 1982-10-15 1982-10-15 ボタン電話装置 Granted JPS5970344A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18116282A JPS5970344A (ja) 1982-10-15 1982-10-15 ボタン電話装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18116282A JPS5970344A (ja) 1982-10-15 1982-10-15 ボタン電話装置

Publications (2)

Publication Number Publication Date
JPS5970344A true JPS5970344A (ja) 1984-04-20
JPH0113797B2 JPH0113797B2 (enrdf_load_stackoverflow) 1989-03-08

Family

ID=16095967

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18116282A Granted JPS5970344A (ja) 1982-10-15 1982-10-15 ボタン電話装置

Country Status (1)

Country Link
JP (1) JPS5970344A (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03104296A (ja) * 1989-09-19 1991-05-01 Mazda Motor Corp 金属基板を有する集積回路

Also Published As

Publication number Publication date
JPH0113797B2 (enrdf_load_stackoverflow) 1989-03-08

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