JPS5570142A - Automatic channel switching system for 2-channel radio communication - Google Patents

Automatic channel switching system for 2-channel radio communication

Info

Publication number
JPS5570142A
JPS5570142A JP14334778A JP14334778A JPS5570142A JP S5570142 A JPS5570142 A JP S5570142A JP 14334778 A JP14334778 A JP 14334778A JP 14334778 A JP14334778 A JP 14334778A JP S5570142 A JPS5570142 A JP S5570142A
Authority
JP
Japan
Prior art keywords
normal
call
emergency
stations
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.)
Pending
Application number
JP14334778A
Other languages
Japanese (ja)
Inventor
Yukio Saiki
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.)
Kokusai Denki Electric Inc
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 JP14334778A priority Critical patent/JPS5570142A/en
Publication of JPS5570142A publication Critical patent/JPS5570142A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]

Landscapes

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

Abstract

PURPOSE:To reduce the non-connection due to the misoperation or the like and thus to realize a quick emergency call by combining the channel switch signal with the individual call signal for transmission to the specified terminal radio station and thus securing an automatic switching between the normal and emergency radio units at the specified terminal radio station. CONSTITUTION:In case the switching is given from the normal call channel to the emergency call between terminal radio stations 8-8'' and the control office including exchange 1 plus emergency and normal call radio units 6 and 7 connected to normal and emergency call signal converters 2 and 2', both the normal call channel switch signal and the individual call signal are transmitted from unit 2 of the control office to stations 8-8'' individually. Receiving these signals, the radio stations actuate channel switch control circuit 12 via channel switch 9 to perform an automatic switching from normal to emergency call radio units 10 and 11. While in case no individual call signal is received, stations 8-8'' keep unit 10 under the holding state.
JP14334778A 1978-11-22 1978-11-22 Automatic channel switching system for 2-channel radio communication Pending JPS5570142A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14334778A JPS5570142A (en) 1978-11-22 1978-11-22 Automatic channel switching system for 2-channel radio communication

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14334778A JPS5570142A (en) 1978-11-22 1978-11-22 Automatic channel switching system for 2-channel radio communication

Publications (1)

Publication Number Publication Date
JPS5570142A true JPS5570142A (en) 1980-05-27

Family

ID=15336668

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14334778A Pending JPS5570142A (en) 1978-11-22 1978-11-22 Automatic channel switching system for 2-channel radio communication

Country Status (1)

Country Link
JP (1) JPS5570142A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0526045U (en) * 1991-09-06 1993-04-06 杉山金属株式会社 Vacuum cleaner cleaner

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0526045U (en) * 1991-09-06 1993-04-06 杉山金属株式会社 Vacuum cleaner cleaner

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