JPS55105456A - Interphone device - Google Patents

Interphone device

Info

Publication number
JPS55105456A
JPS55105456A JP1220579A JP1220579A JPS55105456A JP S55105456 A JPS55105456 A JP S55105456A JP 1220579 A JP1220579 A JP 1220579A JP 1220579 A JP1220579 A JP 1220579A JP S55105456 A JPS55105456 A JP S55105456A
Authority
JP
Japan
Prior art keywords
talking
devices
ringing tone
power source
switches
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.)
Pending
Application number
JP1220579A
Other languages
Japanese (ja)
Inventor
Isamu Okui
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.)
Toshiba Electric Equipment Corp
Original Assignee
Toshiba Electric Equipment Corp
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 Toshiba Electric Equipment Corp filed Critical Toshiba Electric Equipment Corp
Priority to JP1220579A priority Critical patent/JPS55105456A/en
Publication of JPS55105456A publication Critical patent/JPS55105456A/en
Pending 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)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)

Abstract

PURPOSE:To obtain a simple and low-cost interphone device by installing the DC power source common to plural units of talking devices plus ringing tone generator which gives the waveform conversion to the output of the power source. CONSTITUTION:Talking devices 11-1n possess ringing tone and transmission speaker SP1, the reception speaker and channel selection switch Sij (i, j=1, 2...n), and carry out the talking among the optional talking devices. And DC power source 2 and waveform converter 3 for generation of the ringing tone are connected in common to those talking devices. And if the handset is taken up with talking device 11, switches S1-S3 switch from the positions shwon in the diagram. After this, speaker SP1 within device 12 is connected to converter 3 via switches S12 and S1 within device 11 and with operation channel selection switch S12, and thus the ringing tone is generated at device 12. When the handset is picked up with device 12, switches S1-S3 within device 12 are switched. Thus the talking becomes possible between devices 11 and 12.
JP1220579A 1979-02-07 1979-02-07 Interphone device Pending JPS55105456A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1220579A JPS55105456A (en) 1979-02-07 1979-02-07 Interphone device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1220579A JPS55105456A (en) 1979-02-07 1979-02-07 Interphone device

Publications (1)

Publication Number Publication Date
JPS55105456A true JPS55105456A (en) 1980-08-13

Family

ID=11798883

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1220579A Pending JPS55105456A (en) 1979-02-07 1979-02-07 Interphone device

Country Status (1)

Country Link
JP (1) JPS55105456A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5942670U (en) * 1982-09-10 1984-03-19 アイホン株式会社 intercom device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5942670U (en) * 1982-09-10 1984-03-19 アイホン株式会社 intercom device
JPH0438621Y2 (en) * 1982-09-10 1992-09-09

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