JPS57152738A - Radio system for administration of prevention against disaster - Google Patents

Radio system for administration of prevention against disaster

Info

Publication number
JPS57152738A
JPS57152738A JP3776181A JP3776181A JPS57152738A JP S57152738 A JPS57152738 A JP S57152738A JP 3776181 A JP3776181 A JP 3776181A JP 3776181 A JP3776181 A JP 3776181A JP S57152738 A JPS57152738 A JP S57152738A
Authority
JP
Japan
Prior art keywords
wave
urgency
normal
terminal
station
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
JP3776181A
Other languages
Japanese (ja)
Inventor
Takashi Hirao
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP3776181A priority Critical patent/JPS57152738A/en
Publication of JPS57152738A publication Critical patent/JPS57152738A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

PURPOSE:To avoid the interference with another terminal station which uses a normal wave which has the same frequency as an urgency wave, by returning terminal stations, which use the urgency wave, to terminal stations, which use the normal wave, to broadcast a command from a control station with the normal wave. CONSTITUTION:When a control station 6, a repeating station 7, and a terminal block 1 constitute a normal wave circuit, the control station side makes a signal converting device 13 for urgency wave operatable after transmitting an urgency wave switching signal from a radio equipment 9 for normal wave. When receiving this urgency wave switching signal with the normal wave, the terminal station 1 switches a radio equipment 18 to the urgency wave. In case of broadcasting of a command, the control station side transmits broadcasting command information with the normal wave after transmitting an urgency wave switching release signal with the urgency wave. The terminal station 1 receives the urgency wave switching release signal to return the radio equipment to the normal wave and receives the broadcasting command.
JP3776181A 1981-03-18 1981-03-18 Radio system for administration of prevention against disaster Pending JPS57152738A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3776181A JPS57152738A (en) 1981-03-18 1981-03-18 Radio system for administration of prevention against disaster

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3776181A JPS57152738A (en) 1981-03-18 1981-03-18 Radio system for administration of prevention against disaster

Publications (1)

Publication Number Publication Date
JPS57152738A true JPS57152738A (en) 1982-09-21

Family

ID=12506449

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3776181A Pending JPS57152738A (en) 1981-03-18 1981-03-18 Radio system for administration of prevention against disaster

Country Status (1)

Country Link
JP (1) JPS57152738A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01103103A (en) * 1987-10-15 1989-04-20 Ohbayashi Corp Power control system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01103103A (en) * 1987-10-15 1989-04-20 Ohbayashi Corp Power control system

Similar Documents

Publication Publication Date Title
JPS6471344A (en) Radio communication system using synchronized frequency hopping transmission
EP0124260A3 (en) Power supply line carrier communication systems
JPS57152738A (en) Radio system for administration of prevention against disaster
JPS56104561A (en) Data transmission system
ATE10996T1 (en) RADIO EQUIPMENT.
JPS5362903A (en) Urgency signal transmission system
JPS5720051A (en) Reception switching system of digital radio system
JPS5577248A (en) Abnormality detection system for moving body
JPS57180241A (en) Radio communication system
JPS56104558A (en) Switching system of multitransmission line
JPS57199345A (en) Mobile radio communication system
JPS57141146A (en) Radio repeating device
JPS53105902A (en) Position detecting system for mobile radio station
JPS53133316A (en) Urgent interruption communication system
JPS5799043A (en) Mobile radio communication system
JPS5686541A (en) Busy-tone transmission system for radio relay station
JPS56119557A (en) Communication mode switching system
JPS5364406A (en) General command communication system
JPS56149831A (en) Duplex line switching unit
JPS56132036A (en) Confirmation system for operating equipment of terminal station
JPS5755634A (en) Terminal station emergency interruption communicaton system of communication system
JPS647725A (en) Radio base station equipment
JPS5732145A (en) Pilot control system
JPS5613856A (en) Signal transmitting system
JPS57183168A (en) Circuit selection system