JPS5582558A - Interphone of alternate communication type - Google Patents

Interphone of alternate communication type

Info

Publication number
JPS5582558A
JPS5582558A JP15673378A JP15673378A JPS5582558A JP S5582558 A JPS5582558 A JP S5582558A JP 15673378 A JP15673378 A JP 15673378A JP 15673378 A JP15673378 A JP 15673378A JP S5582558 A JPS5582558 A JP S5582558A
Authority
JP
Japan
Prior art keywords
time limit
audio
interphone
time
communication type
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
JP15673378A
Other languages
Japanese (ja)
Other versions
JPS5917920B2 (en
Inventor
Shigeo Azuma
Hideo Hirano
Jun Matsumoto
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.)
AIHON KK
Aiphone Co Ltd
Original Assignee
AIHON KK
Aiphone 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 AIHON KK, Aiphone Co Ltd filed Critical AIHON KK
Priority to JP15673378A priority Critical patent/JPS5917920B2/en
Publication of JPS5582558A publication Critical patent/JPS5582558A/en
Publication of JPS5917920B2 publication Critical patent/JPS5917920B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)

Abstract

PURPOSE:To increase the manipulation, by using a part of the output signal from the amplifier as the drive source driving the time limit circuit. CONSTITUTION:A part of the audio output signal from the amplifier 14 is fed to the conversion circuit 13, this is in A/D conversion, fed to the time limit circuit 10, and stored to keep the set condition while the audio from the slave unit 1 is continued. If the audio from the slave unit 1 is interrupted after Tr time, the signal stored in the time limit circuit 10 is taken as the drive source and this is driven for a given time To, the time limit is released and it is automatically restored to the waiting state.
JP15673378A 1978-12-16 1978-12-16 Alternate conversation intercom Expired JPS5917920B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15673378A JPS5917920B2 (en) 1978-12-16 1978-12-16 Alternate conversation intercom

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15673378A JPS5917920B2 (en) 1978-12-16 1978-12-16 Alternate conversation intercom

Publications (2)

Publication Number Publication Date
JPS5582558A true JPS5582558A (en) 1980-06-21
JPS5917920B2 JPS5917920B2 (en) 1984-04-24

Family

ID=15634129

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15673378A Expired JPS5917920B2 (en) 1978-12-16 1978-12-16 Alternate conversation intercom

Country Status (1)

Country Link
JP (1) JPS5917920B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5896448A (en) * 1981-12-03 1983-06-08 Matsushita Electric Ind Co Ltd Detection circuit for non-information
US10520098B2 (en) 2014-10-07 2019-12-31 Kitz Corporation Butterfly-valve seat ring and fixing structure of the same, and eccentric-type butterfly valve

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5896448A (en) * 1981-12-03 1983-06-08 Matsushita Electric Ind Co Ltd Detection circuit for non-information
US10520098B2 (en) 2014-10-07 2019-12-31 Kitz Corporation Butterfly-valve seat ring and fixing structure of the same, and eccentric-type butterfly valve

Also Published As

Publication number Publication date
JPS5917920B2 (en) 1984-04-24

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