JPS5215206A - Detector circuit for key telephone - Google Patents

Detector circuit for key telephone

Info

Publication number
JPS5215206A
JPS5215206A JP9115175A JP9115175A JPS5215206A JP S5215206 A JPS5215206 A JP S5215206A JP 9115175 A JP9115175 A JP 9115175A JP 9115175 A JP9115175 A JP 9115175A JP S5215206 A JPS5215206 A JP S5215206A
Authority
JP
Japan
Prior art keywords
detector circuit
key telephone
key
lines
various functions
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
JP9115175A
Other languages
English (en)
Other versions
JPS5631787B2 (ja
Inventor
Minoru Sasai
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.)
KANDA TSUUSHIN KOUGIYOU KK
Kanda Tsushin Kogyo Co Ltd
Original Assignee
KANDA TSUUSHIN KOUGIYOU KK
Kanda Tsushin Kogyo 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 KANDA TSUUSHIN KOUGIYOU KK, Kanda Tsushin Kogyo Co Ltd filed Critical KANDA TSUUSHIN KOUGIYOU KK
Priority to JP9115175A priority Critical patent/JPS5215206A/ja
Priority to US05/707,324 priority patent/US4079212A/en
Publication of JPS5215206A publication Critical patent/JPS5215206A/ja
Publication of JPS5631787B2 publication Critical patent/JPS5631787B2/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
    • H04M9/02—Arrangements for interconnection not involving centralised switching involving a common line for all parties

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
JP9115175A 1975-07-23 1975-07-28 Detector circuit for key telephone Granted JPS5215206A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP9115175A JPS5215206A (en) 1975-07-28 1975-07-28 Detector circuit for key telephone
US05/707,324 US4079212A (en) 1975-07-23 1976-07-21 Extension telephone system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9115175A JPS5215206A (en) 1975-07-28 1975-07-28 Detector circuit for key telephone

Publications (2)

Publication Number Publication Date
JPS5215206A true JPS5215206A (en) 1977-02-04
JPS5631787B2 JPS5631787B2 (ja) 1981-07-23

Family

ID=14018504

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9115175A Granted JPS5215206A (en) 1975-07-23 1975-07-28 Detector circuit for key telephone

Country Status (1)

Country Link
JP (1) JPS5215206A (ja)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5866496A (ja) * 1981-10-15 1983-04-20 Matsushita Electric Ind Co Ltd スピ−カ

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4915083A (ja) * 1972-05-22 1974-02-09

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4915083A (ja) * 1972-05-22 1974-02-09

Also Published As

Publication number Publication date
JPS5631787B2 (ja) 1981-07-23

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