JPS5539426A - Emergency calling system for radio communication system - Google Patents

Emergency calling system for radio communication system

Info

Publication number
JPS5539426A
JPS5539426A JP11232478A JP11232478A JPS5539426A JP S5539426 A JPS5539426 A JP S5539426A JP 11232478 A JP11232478 A JP 11232478A JP 11232478 A JP11232478 A JP 11232478A JP S5539426 A JPS5539426 A JP S5539426A
Authority
JP
Japan
Prior art keywords
idle
channel
holding
office
signal
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
JP11232478A
Other languages
Japanese (ja)
Other versions
JPS5736774B2 (en
Inventor
Katsuji Murata
Masashi Fukui
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.)
Hitachi Denshi KK
Original Assignee
Hitachi Denshi KK
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 Hitachi Denshi KK filed Critical Hitachi Denshi KK
Priority to JP11232478A priority Critical patent/JPS5539426A/en
Publication of JPS5539426A publication Critical patent/JPS5539426A/en
Publication of JPS5736774B2 publication Critical patent/JPS5736774B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W99/00—Subject matter not provided for in other groups of this subclass

Abstract

PURPOSE:To secure the communication by providing the emergency switch in case no idle channel can be caught by the terminal station and thus no communication is possible in an emergency. CONSTITUTION:The holding signal is transmitted previously from the control office via the idle channel to be used for the call given from the control office. At the same time, the idle line signal is transmitted to other idle channels from the control office. At each terminal station, the channels are switched in sequenceevery fixed cycle for scanning, and the scanning is stopped for the holding channel where the holding signal is received to secure the holding state. With reception of the call signal to the self-station via the holding channel, the communication is started with the control office. The calling is given from the terminal office by transmitting the call signal to the control office through the idle channel (to which the idle line signal is transmitted) which is caught first. In case no idle channel can be caught by the terminal office in an emergency, the emergency switch is operated to perform the transmission of the call signal to the control office from the terminal station via the holding channel.
JP11232478A 1978-09-14 1978-09-14 Emergency calling system for radio communication system Granted JPS5539426A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11232478A JPS5539426A (en) 1978-09-14 1978-09-14 Emergency calling system for radio communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11232478A JPS5539426A (en) 1978-09-14 1978-09-14 Emergency calling system for radio communication system

Publications (2)

Publication Number Publication Date
JPS5539426A true JPS5539426A (en) 1980-03-19
JPS5736774B2 JPS5736774B2 (en) 1982-08-05

Family

ID=14583815

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11232478A Granted JPS5539426A (en) 1978-09-14 1978-09-14 Emergency calling system for radio communication system

Country Status (1)

Country Link
JP (1) JPS5539426A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5678188A (en) * 1993-09-14 1997-10-14 Sony Corporation Emergency message communication method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5678188A (en) * 1993-09-14 1997-10-14 Sony Corporation Emergency message communication method

Also Published As

Publication number Publication date
JPS5736774B2 (en) 1982-08-05

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