JPS5533359A - Priority channel switching device - Google Patents

Priority channel switching device

Info

Publication number
JPS5533359A
JPS5533359A JP10592078A JP10592078A JPS5533359A JP S5533359 A JPS5533359 A JP S5533359A JP 10592078 A JP10592078 A JP 10592078A JP 10592078 A JP10592078 A JP 10592078A JP S5533359 A JPS5533359 A JP S5533359A
Authority
JP
Japan
Prior art keywords
priority channel
scr4
switching
microphone
call
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
JP10592078A
Other languages
Japanese (ja)
Other versions
JPS5758819B2 (en
Inventor
Kunihiko Ueki
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.)
Marantz Japan Inc
Original Assignee
Marantz Japan Inc
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 Marantz Japan Inc filed Critical Marantz Japan Inc
Priority to JP10592078A priority Critical patent/JPS5533359A/en
Publication of JPS5533359A publication Critical patent/JPS5533359A/en
Publication of JPS5758819B2 publication Critical patent/JPS5758819B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Transceivers (AREA)

Abstract

PURPOSE: To secure an assured call in the priority channel by installing the self- holding circuit which detects the conducting action for the hook-on of the microphone or the like and holds the conducting state with the detection output plus the switching circuit to give switching to the priority channel.
CONSTITUTION: With hooking of the microphone to the communication equipment, a contact is given between electrodes 12 and 13 to give conduction to transistor Tr1 via resistance 8 plus switch contacts d and c. And as a result, the voltage is applied to the priority channel switching circuit to give switching to the talking state at the priority channel. When Tr1 is switched to the conducting state, the trigger is applied to the gate of SCR4 via the pulse drawn out of capacitor 9 and resistance 10. Then SCR4 is made to conduct to secure the self-holding and thus to hold the conducting state. When the microphone is picked up from the hook, electrode 12 is separated from electrode 13 to cut off Tr1. And Tr3 and 2 conduct by the conduction of SCR4 to hold the switching to the priority channel. In the case of the call via other ordinary channels, reset switch 7 is switched with SCR4 cut off to carry out the call.
COPYRIGHT: (C)1980,JPO&Japio
JP10592078A 1978-08-30 1978-08-30 Priority channel switching device Granted JPS5533359A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10592078A JPS5533359A (en) 1978-08-30 1978-08-30 Priority channel switching device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10592078A JPS5533359A (en) 1978-08-30 1978-08-30 Priority channel switching device

Publications (2)

Publication Number Publication Date
JPS5533359A true JPS5533359A (en) 1980-03-08
JPS5758819B2 JPS5758819B2 (en) 1982-12-11

Family

ID=14420291

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10592078A Granted JPS5533359A (en) 1978-08-30 1978-08-30 Priority channel switching device

Country Status (1)

Country Link
JP (1) JPS5533359A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5696539A (en) * 1979-12-29 1981-08-04 General Res Obu Erekutoronitsukusu:Kk Radio set
JPS6077143U (en) * 1983-10-31 1985-05-29 株式会社富士通ゼネラル Radio reset circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5696539A (en) * 1979-12-29 1981-08-04 General Res Obu Erekutoronitsukusu:Kk Radio set
JPS6077143U (en) * 1983-10-31 1985-05-29 株式会社富士通ゼネラル Radio reset circuit

Also Published As

Publication number Publication date
JPS5758819B2 (en) 1982-12-11

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