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

Similar Documents

Publication Publication Date Title
US4700380A (en) Solid state remote actuable switch
US6567476B2 (en) Data synchronisation process, and transmission and reception interfaces
US4444999A (en) Automatic electronic disconnector for subscriber terminal equipment
US3973085A (en) Key telephone system with directly associated station cards and sets
US5495301A (en) Three wire pillow speaker with full television remote control functions
US4734933A (en) Telephone line status circuit
US4525634A (en) Alternating current switching device
GB2075314A (en) Signal transmission system
US5301360A (en) Digital option select system
JPS5970344A (ja) ボタン電話装置
US4046971A (en) Switching arrangement for telephone subsets using impulse-type pushbutton calling
US4926467A (en) Line card with distributed signaling voltages
US5502513A (en) Three wire television remote control operable with key closures or data pulses
US5079457A (en) Dual solid state relay
US4024351A (en) Telephone line battery boost circuit
US4099031A (en) Method and apparatus for automatically identifying an individual calling party on a multiparty telephone line
US4689816A (en) Three relay C. O. trunk interface
US3992591A (en) Telephone line battery boost circuit
JPS5970391A (ja) 電圧信号判別方式
US4311879A (en) AC Supervisory signal detector circuit
NL7907134A (nl) Telefooninstallatie van de als sterpuntinstallatie aangeduide soort.
JP2803781B2 (ja) 電話システム
JPH0638526Y2 (ja) 電話機の電源回路
US4633043A (en) Apparatus for use with key telephone systems
US5325428A (en) Automatic switching-back device for telephone circuit