JPS57184360A - Interphone device - Google Patents

Interphone device

Info

Publication number
JPS57184360A
JPS57184360A JP6975481A JP6975481A JPS57184360A JP S57184360 A JPS57184360 A JP S57184360A JP 6975481 A JP6975481 A JP 6975481A JP 6975481 A JP6975481 A JP 6975481A JP S57184360 A JPS57184360 A JP S57184360A
Authority
JP
Japan
Prior art keywords
interphone
main controller
switch
transmission
mode
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
JP6975481A
Other languages
Japanese (ja)
Inventor
Motoharu Terada
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 Electric Works Co Ltd
Original Assignee
Matsushita Electric Works 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 Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP6975481A priority Critical patent/JPS57184360A/en
Publication of JPS57184360A publication Critical patent/JPS57184360A/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
    • H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic

Abstract

PURPOSE:To increase the operability of a selected interphone, by selecting the interphone for communication and switching the state of reception and the state of transmission of the interphone selected by a press-to-talk switch. CONSTITUTION:Plural sets of terminal devices and interphones are connected to a main controller via a common transmission line 1. In case the talking is carried out between an interphone C1 and another interphone, a channel selection switch 6 corresponding to the interphone to be called out is first operated. At the same time, a press-to-talk switch 12 is pushed for the speech transmission. This mode is sent to the main controller via a terminal logic processing circuit. The main controller feeds the control signal to the selected interphone to give the conduction and the reception mode to a switch 19. When the switch 12 of the interphone C1 is released, the main controller feeds the control signal in the same way to give the transmission mode to the selected interphone.
JP6975481A 1981-05-09 1981-05-09 Interphone device Pending JPS57184360A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6975481A JPS57184360A (en) 1981-05-09 1981-05-09 Interphone device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6975481A JPS57184360A (en) 1981-05-09 1981-05-09 Interphone device

Publications (1)

Publication Number Publication Date
JPS57184360A true JPS57184360A (en) 1982-11-13

Family

ID=13411891

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6975481A Pending JPS57184360A (en) 1981-05-09 1981-05-09 Interphone device

Country Status (1)

Country Link
JP (1) JPS57184360A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5997264A (en) * 1982-11-26 1984-06-05 Matsushita Electric Ind Co Ltd Interphone control system
JPS6074760A (en) * 1983-09-30 1985-04-27 Toshiba Electric Equip Corp Interphone set
JPS6215948A (en) * 1985-07-12 1987-01-24 Fujitsu Ltd Ordering communication control system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4521769Y1 (en) * 1967-09-30 1970-08-29
JPS5613847A (en) * 1979-07-14 1981-02-10 Matsushita Electric Works Ltd Multistation interphone

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4521769Y1 (en) * 1967-09-30 1970-08-29
JPS5613847A (en) * 1979-07-14 1981-02-10 Matsushita Electric Works Ltd Multistation interphone

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5997264A (en) * 1982-11-26 1984-06-05 Matsushita Electric Ind Co Ltd Interphone control system
JPS6074760A (en) * 1983-09-30 1985-04-27 Toshiba Electric Equip Corp Interphone set
JPS6215948A (en) * 1985-07-12 1987-01-24 Fujitsu Ltd Ordering communication control system

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