JPS634380B2 - - Google Patents

Info

Publication number
JPS634380B2
JPS634380B2 JP2908680A JP2908680A JPS634380B2 JP S634380 B2 JPS634380 B2 JP S634380B2 JP 2908680 A JP2908680 A JP 2908680A JP 2908680 A JP2908680 A JP 2908680A JP S634380 B2 JPS634380 B2 JP S634380B2
Authority
JP
Japan
Prior art keywords
telephone
speakerphone
circuit
switch
pushbutton
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
JP2908680A
Other languages
English (en)
Japanese (ja)
Other versions
JPS56126359A (en
Inventor
Masato Araki
Makoto Yoshimoto
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.)
Iwasaki Tsushinki KK
Original Assignee
Iwasaki Tsushinki KK
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 Iwasaki Tsushinki KK filed Critical Iwasaki Tsushinki KK
Priority to JP2908680A priority Critical patent/JPS56126359A/ja
Publication of JPS56126359A publication Critical patent/JPS56126359A/ja
Publication of JPS634380B2 publication Critical patent/JPS634380B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/26—Devices for calling a subscriber
    • H04M1/30—Devices which can set up and transmit only one digit at a time
    • H04M1/50—Devices which can set up and transmit only one digit at a time by generating or selecting currents of predetermined frequencies or combinations of frequencies

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
JP2908680A 1980-03-10 1980-03-10 Connecting system between push-button telephone set and speakerphone Granted JPS56126359A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2908680A JPS56126359A (en) 1980-03-10 1980-03-10 Connecting system between push-button telephone set and speakerphone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2908680A JPS56126359A (en) 1980-03-10 1980-03-10 Connecting system between push-button telephone set and speakerphone

Publications (2)

Publication Number Publication Date
JPS56126359A JPS56126359A (en) 1981-10-03
JPS634380B2 true JPS634380B2 (enrdf_load_stackoverflow) 1988-01-28

Family

ID=12266531

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2908680A Granted JPS56126359A (en) 1980-03-10 1980-03-10 Connecting system between push-button telephone set and speakerphone

Country Status (1)

Country Link
JP (1) JPS56126359A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
JPS56126359A (en) 1981-10-03

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