JPS54144112A - Call out circuit for carrier type interphone - Google Patents
Call out circuit for carrier type interphoneInfo
- 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
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
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)
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 |
-
1978
- 1978-05-02 JP JP5301978A patent/JPS54144112A/en active Pending
Cited By (3)
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 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
ES8507305A1 (en) | Switching system with separate supervisory links | |
JPS57135530A (en) | Communication control system | |
EP0124260A3 (en) | Power supply line carrier communication systems | |
JPS57150258A (en) | Sub-signal transmission system | |
JPS54144112A (en) | Call out circuit for carrier type interphone | |
JPS57160236A (en) | Multiple transmission system for vehicle | |
JPS556628A (en) | Fault transfer systen | |
JPS57121332A (en) | System for equalizing amplitude distortion of data transmission line | |
JPS5628553A (en) | Data transmission system | |
JPS5553764A (en) | Unmanned operation and remote mutual control system for computer | |
JPS5732145A (en) | Pilot control system | |
JPS57761A (en) | Monitoring system for operation state of decentralized processor | |
JPS53136910A (en) | Initial connection system for time division multiple connecting communication system | |
JPS5487425A (en) | Still-picture video telephone set | |
JPS57135545A (en) | Diagnosis system for data transmission system | |
JPS57142038A (en) | Signal transmitting device | |
JPS5613856A (en) | Signal transmitting system | |
JPS56154847A (en) | Connection system for transmission line | |
JPS5365007A (en) | Transmission system for intermittent signal | |
JPS5534586A (en) | Trouble detecting system in two-ways data communication system | |
JPS5230135A (en) | Branch unit | |
JPS5357446A (en) | Protection process for dc power transmission system | |
JPS5388510A (en) | Simultaneous call preventing system for radio communication | |
JPS57176441A (en) | Data transfer system | |
JPS5676801A (en) | Plant control device |