JPS5573106A - Switching system between using and stand-by monitor control channels - Google Patents
Switching system between using and stand-by monitor control channelsInfo
- Publication number
- JPS5573106A JPS5573106A JP14619278A JP14619278A JPS5573106A JP S5573106 A JPS5573106 A JP S5573106A JP 14619278 A JP14619278 A JP 14619278A JP 14619278 A JP14619278 A JP 14619278A JP S5573106 A JPS5573106 A JP S5573106A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- switch
- monitor control
- station
- stand
- 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
- Radio Relay Systems (AREA)
Abstract
PURPOSE: To simplify the constitution of the repeater station by providing the transmission/reception change-over switch at the intermediate repeater station and then giving the selective control to the switch in sequence in the radio communication circuit of the heterodyne repeating system.
CONSTITUTION: The signal sent from monitor control channel pilot oscillator 21 is always transmitted from transmission end office 1 to be detected at monitor control channel detector 22 of intermediate repeater station 3. When using circuit M1 has some fault, the using circuit switch signal is transmitted to office 1 from reception end office 2 via monitor control channel 20 and then detected by using circuit switch signal detector 23 of station 3 for driving of sequential selection controller 24. When no pilot signal is detected at detector 22, controller 24 actuates IRSW of the stand- by circuit of reception change-over switch 18 to select stand-by circuit STB where the pilot signal is detected. Transmission change-over switch 19 is operated in response to switch 18. In such way, the circuit switch signal interception detector can be shared for switching between the using the stand-by monitor control channels at station 3, thus simplifying the constitution of station 3.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14619278A JPS5573106A (en) | 1978-11-27 | 1978-11-27 | Switching system between using and stand-by monitor control channels |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14619278A JPS5573106A (en) | 1978-11-27 | 1978-11-27 | Switching system between using and stand-by monitor control channels |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5573106A true JPS5573106A (en) | 1980-06-02 |
Family
ID=15402205
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14619278A Pending JPS5573106A (en) | 1978-11-27 | 1978-11-27 | Switching system between using and stand-by monitor control channels |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5573106A (en) |
-
1978
- 1978-11-27 JP JP14619278A patent/JPS5573106A/en active Pending
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