EMERGENCY CALL UNIT

To determine whether a busy state of an incoming call to a preset general report destination is made due to a third person incoming and outgoing call restriction function or is made due to a general report destination busy call after an emergency call to a command board.SOLUTION: An emergency call u...

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Bibliographic Details
Main Authors MIYAJIMA YOSHIYUKI, TAIRA TETSUYA
Format Patent
LanguageEnglish
Japanese
Published 19.11.2020
Subjects
ALARM SYSTEMS
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
ORDER TELEGRAPHS
PHYSICS
SIGNALLING
SIGNALLING OR CALLING SYSTEMS
TELEPHONIC COMMUNICATION
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