JPS54144112A - Call out circuit for carrier type interphone - Google Patents

Call out circuit for carrier type interphone

Info

Publication number
JPS54144112A
JPS54144112A JP5301978A JP5301978A JPS54144112A JP S54144112 A JPS54144112 A JP S54144112A JP 5301978 A JP5301978 A JP 5301978A JP 5301978 A JP5301978 A JP 5301978A JP S54144112 A JPS54144112 A JP S54144112A
Authority
JP
Japan
Prior art keywords
carrier
call out
out signal
reception
master
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
JP5301978A
Other languages
Japanese (ja)
Inventor
Yoshiharu Suzuki
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 JP5301978A priority Critical patent/JPS54144112A/en
Publication of JPS54144112A publication Critical patent/JPS54144112A/en
Pending legal-status Critical Current

Links

Landscapes

  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)

Abstract

PURPOSE: To inform failures, by immediately generating the call out signal at the reception side, through the provision of the reception section having the call out signal generator at the master and slave unit, when the carrier from the transmission side is not received.
CONSTITUTION: The carrier generating units 6X and 6Y transmit the carrier to the receiving end with normal operation, the transmission sections 2X, 2Y modulate 7X, 7Y the carrier with audio signal to perform transmission, and the reception sections 2X, 3Y receive the carrier. When the carrier from the transmission side is not received, call out signal is transmitted with the call out signals generator 13X, 13Y, the reception section 3X, 3Y having the units 13X, 13Y, are provided with the master X and slave unit Y to perform communication between the master X and slave unit Y. Thus, even if the carrier is stopped with failure, the call out signal is immediately generated at the reception side to inform the failure.
COPYRIGHT: (C)1979,JPO&Japio
JP5301978A 1978-05-02 1978-05-02 Call out circuit for carrier type interphone Pending JPS54144112A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5301978A JPS54144112A (en) 1978-05-02 1978-05-02 Call out circuit for carrier type interphone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5301978A JPS54144112A (en) 1978-05-02 1978-05-02 Call out circuit for carrier type interphone

Publications (1)

Publication Number Publication Date
JPS54144112A true JPS54144112A (en) 1979-11-10

Family

ID=12931180

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5301978A Pending JPS54144112A (en) 1978-05-02 1978-05-02 Call out circuit for carrier type interphone

Country Status (1)

Country Link
JP (1) JPS54144112A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5871760A (en) * 1981-10-26 1983-04-28 Shinsei Denki Kogyo Kk Nurse calling system
JPS5977758A (en) * 1982-10-26 1984-05-04 Matsushita Electric Ind Co Ltd Interphone set

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5871760A (en) * 1981-10-26 1983-04-28 Shinsei Denki Kogyo Kk Nurse calling system
JPS6237589B2 (en) * 1981-10-26 1987-08-13 Shinsei Elec Ind
JPS5977758A (en) * 1982-10-26 1984-05-04 Matsushita Electric Ind Co Ltd Interphone set

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