JPS5573106A - Switching system between using and stand-by monitor control channels - Google Patents

Switching system between using and stand-by monitor control channels

Info

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
Application number
JP14619278A
Other languages
Japanese (ja)
Inventor
Mutsuo Tsunoda
Junichi Shigematsu
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP14619278A priority Critical patent/JPS5573106A/en
Publication of JPS5573106A publication Critical patent/JPS5573106A/en
Pending legal-status Critical Current

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
JP14619278A 1978-11-27 1978-11-27 Switching system between using and stand-by monitor control channels Pending JPS5573106A (en)

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)

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