JPH0238039B2 - - Google Patents

Info

Publication number
JPH0238039B2
JPH0238039B2 JP57162567A JP16256782A JPH0238039B2 JP H0238039 B2 JPH0238039 B2 JP H0238039B2 JP 57162567 A JP57162567 A JP 57162567A JP 16256782 A JP16256782 A JP 16256782A JP H0238039 B2 JPH0238039 B2 JP H0238039B2
Authority
JP
Japan
Prior art keywords
power
telephone
extension telephone
power supply
circuit
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.)
Expired - Lifetime
Application number
JP57162567A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5951648A (ja
Inventor
Shinichi Sekiguchi
Masashi Suzuki
Nobuo Matoba
Takashi Hayashi
Sachio Aoyama
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP57162567A priority Critical patent/JPS5951648A/ja
Publication of JPS5951648A publication Critical patent/JPS5951648A/ja
Publication of JPH0238039B2 publication Critical patent/JPH0238039B2/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
    • H04M9/005—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems with subscriber controlled access to an exchange line

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Stand-By Power Supply Arrangements (AREA)
  • Control Of Voltage And Current In General (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
JP57162567A 1982-09-17 1982-09-17 ボタン電話装置 Granted JPS5951648A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57162567A JPS5951648A (ja) 1982-09-17 1982-09-17 ボタン電話装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57162567A JPS5951648A (ja) 1982-09-17 1982-09-17 ボタン電話装置

Publications (2)

Publication Number Publication Date
JPS5951648A JPS5951648A (ja) 1984-03-26
JPH0238039B2 true JPH0238039B2 (ko) 1990-08-28

Family

ID=15757037

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57162567A Granted JPS5951648A (ja) 1982-09-17 1982-09-17 ボタン電話装置

Country Status (1)

Country Link
JP (1) JPS5951648A (ko)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61163796A (ja) * 1985-01-14 1986-07-24 Tamura Electric Works Ltd ボタン電話装置
JPH0738735B2 (ja) * 1985-04-30 1995-04-26 岩崎通信機株式会社 ボタン電話装置
JPS63261980A (ja) * 1987-04-20 1988-10-28 Tamura Electric Works Ltd ボタン電話装置
JPH0332195A (ja) * 1989-06-28 1991-02-12 Taiko Denki Seisakusho:Kk ボタン電話装置
US5305312A (en) * 1992-02-07 1994-04-19 At&T Bell Laboratories Apparatus for interfacing analog telephones and digital data terminals to an ISDN line
JP2007174031A (ja) * 2005-12-20 2007-07-05 Nakayo Telecommun Inc 省電力型バックアップ機能付きキーテレホンシステム
JP6037457B2 (ja) * 2014-01-24 2016-12-07 Ｎｅｃプラットフォームズ株式会社 通信装置及び電力制御方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56162938A (en) * 1980-05-21 1981-12-15 Mitsubishi Electric Corp Power source backup device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56162938A (en) * 1980-05-21 1981-12-15 Mitsubishi Electric Corp Power source backup device

Also Published As

Publication number Publication date
JPS5951648A (ja) 1984-03-26

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