JPS5683148A - Radio system for administration of diaster protection - Google Patents

Radio system for administration of diaster protection

Info

Publication number
JPS5683148A
JPS5683148A JP15977579A JP15977579A JPS5683148A JP S5683148 A JPS5683148 A JP S5683148A JP 15977579 A JP15977579 A JP 15977579A JP 15977579 A JP15977579 A JP 15977579A JP S5683148 A JPS5683148 A JP S5683148A
Authority
JP
Japan
Prior art keywords
line
station
local
stations
multiplex
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.)
Granted
Application number
JP15977579A
Other languages
Japanese (ja)
Other versions
JPS631783B2 (en
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 JP15977579A priority Critical patent/JPS5683148A/en
Publication of JPS5683148A publication Critical patent/JPS5683148A/en
Publication of JPS631783B2 publication Critical patent/JPS631783B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/74—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for increasing reliability, e.g. using redundant or spare channels or apparatus

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Small-Scale Networks (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Relay Systems (AREA)

Abstract

PURPOSE:To secure the communication lines between local stations at each district and terminal stations administrating the district even at a minimum number, by providing switching means which switches and connects the direct line between local stations and a control station into the direct line between the local stations and the terminal stations, if a failure is taken place to major multiplex lines. CONSTITUTION:Taking an exchanger 1 in the control station as a center, the line of which terminal is connected to a plurality of terminal stations via a single radio device 5, is connected to a multiplex radio device 2 via a selective calling device 17 in the control station. Further, the line of which terminal is connected to a local station is connected to the radio devide 2 with a multiplex radio device in the relay station without interposing the device 17. Further, between a multiplex radio device 4 connected to the line of the local station of the relay station and the radio device 3, a line switching device 32 is provided, and further, a line switching device 33 is provided in the local station. The device 32 is provided with a circuit detecting a failure of the major multiplex line, and if a failure is detected, the line coupling the extension telephone 6 of the local station and the control station is switched to the line coupling the local station and all the terminal stations administrated, allowing to call out from the local station to the terminal stations by voice.
JP15977579A 1979-12-11 1979-12-11 Radio system for administration of diaster protection Granted JPS5683148A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15977579A JPS5683148A (en) 1979-12-11 1979-12-11 Radio system for administration of diaster protection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15977579A JPS5683148A (en) 1979-12-11 1979-12-11 Radio system for administration of diaster protection

Publications (2)

Publication Number Publication Date
JPS5683148A true JPS5683148A (en) 1981-07-07
JPS631783B2 JPS631783B2 (en) 1988-01-14

Family

ID=15700983

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15977579A Granted JPS5683148A (en) 1979-12-11 1979-12-11 Radio system for administration of diaster protection

Country Status (1)

Country Link
JP (1) JPS5683148A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01320833A (en) * 1988-06-22 1989-12-26 Oki Electric Ind Co Ltd Fault control system for mobile body communication

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01320833A (en) * 1988-06-22 1989-12-26 Oki Electric Ind Co Ltd Fault control system for mobile body communication

Also Published As

Publication number Publication date
JPS631783B2 (en) 1988-01-14

Similar Documents

Publication Publication Date Title
GB1464002A (en) Time division switching systems
GB1283968A (en) Switching systems
JPS5683148A (en) Radio system for administration of diaster protection
US3544727A (en) Arrangement for establishing conference connections in communication switching systems
JPS57159153A (en) Line-packet selection communicating system
JPS5654158A (en) Control system for call waiting
GB1473370A (en) Intercommunication systems
JPS5795744A (en) Automatic line switching device for data communication device
GB1130431A (en) Communication switching systems
JPS5570142A (en) Automatic channel switching system for 2-channel radio communication
JPS5752257A (en) Calling control system
JPS5691573A (en) Reception system for dial information
JPS55114047A (en) Automatic channel switching system of two-channel switching radio communication system
GB1436460A (en) Telephone systems
JPS54133807A (en) Register of automatic telephone switchboard
JPS5525249A (en) Special number exchange system
JPS57204670A (en) Call monitoring system
JPS57121346A (en) Hybrid switching network
JPS577655A (en) General multiple address transmission system
GB1082734A (en) Land-to-mobile telephone link
GB798803A (en) Improvements in or relating to automatic telephone exchanges providing automatic transfer service
JPS57183168A (en) Circuit selection system
JPS5617535A (en) Selective calling system
JPS57162861A (en) Button telephone set
JPS55132149A (en) Portable type travelling communication system