JPS647557B2 - - Google Patents

Info

Publication number
JPS647557B2
JPS647557B2 JP9270583A JP9270583A JPS647557B2 JP S647557 B2 JPS647557 B2 JP S647557B2 JP 9270583 A JP9270583 A JP 9270583A JP 9270583 A JP9270583 A JP 9270583A JP S647557 B2 JPS647557 B2 JP S647557B2
Authority
JP
Japan
Prior art keywords
telephone
current
supply line
current supply
detection 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
Application number
JP9270583A
Other languages
English (en)
Japanese (ja)
Other versions
JPS59218088A (ja
Inventor
Minoru Yamanaka
Kenji Sunochi
Kenzaburo Nakajima
Hiroyuki Fukuda
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 JP58092705A priority Critical patent/JPS59218088A/ja
Publication of JPS59218088A publication Critical patent/JPS59218088A/ja
Publication of JPS647557B2 publication Critical patent/JPS647557B2/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)
JP58092705A 1983-05-26 1983-05-26 電子式ボタン電話装置 Granted JPS59218088A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58092705A JPS59218088A (ja) 1983-05-26 1983-05-26 電子式ボタン電話装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58092705A JPS59218088A (ja) 1983-05-26 1983-05-26 電子式ボタン電話装置

Publications (2)

Publication Number Publication Date
JPS59218088A JPS59218088A (ja) 1984-12-08
JPS647557B2 true JPS647557B2 (mo) 1989-02-09

Family

ID=14061896

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58092705A Granted JPS59218088A (ja) 1983-05-26 1983-05-26 電子式ボタン電話装置

Country Status (1)

Country Link
JP (1) JPS59218088A (mo)

Also Published As

Publication number Publication date
JPS59218088A (ja) 1984-12-08

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