JPS5531365A - Roundabout check circuit - Google Patents
Roundabout check circuitInfo
- Publication number
- JPS5531365A JPS5531365A JP10513478A JP10513478A JPS5531365A JP S5531365 A JPS5531365 A JP S5531365A JP 10513478 A JP10513478 A JP 10513478A JP 10513478 A JP10513478 A JP 10513478A JP S5531365 A JPS5531365 A JP S5531365A
- Authority
- JP
- Japan
- Prior art keywords
- roundabout
- securing
- switch
- key station
- check
- 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
- Mobile Radio Communication Systems (AREA)
Abstract
PURPOSE: To check the roundabout action by mounting the switch which releases the voice circuit part to the extent that it is not interrupted to send and receive the control signal required for securing the circuit, in the multiple access radiotelephony equipment.
CONSTITUTION: Since the switch SW1 in the key station 21 is opened at the time of securing the radiolink, it is possible to check the roundabout action by which the signal of the substation 41 which is sent out from the signal modulator 53 is leaked to the isolation side of the hybrid 26 from the hybrid 48, the transmitter 43, and the key station receiver 29, is overlapped with a dial tone from the switchboard side, and a flat dial tone is heard to the receiver of the telephone 60. Also, since the switch SW6 of the substation 41 is opened at the time of securing the radiolink, it is possible not only to prevent the control signal which is transmitted from the key station 21 in this case from being leaked to the telephone 60 but also not to mix noise into the busy tone transmitted to a subscriber side when the radiochannel is being used.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10513478A JPS5531365A (en) | 1978-08-29 | 1978-08-29 | Roundabout check circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10513478A JPS5531365A (en) | 1978-08-29 | 1978-08-29 | Roundabout check circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5531365A true JPS5531365A (en) | 1980-03-05 |
Family
ID=14399274
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10513478A Pending JPS5531365A (en) | 1978-08-29 | 1978-08-29 | Roundabout check circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5531365A (en) |
-
1978
- 1978-08-29 JP JP10513478A patent/JPS5531365A/en active Pending
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