Title:
緊急通報システム
Document Type and Number:
Japanese Patent JP7192379
Kind Code:
B2
Abstract:
To provide an emergency call system in which multiple emergency call telephones are branch-connected to an analog telephone line stored in an emergency call device, capable of avoiding a call-disabled state caused by the analog telephone line becoming electrically unstable, even when the multiple emergency call telephones are off-hook, and quickly letting third parties other than a first caller know the content of the call.SOLUTION: If an exclusive telephone 2-1 for fire notification comes into an off-hook state while the exclusive telephone 2-n for fire notification is in reverse call with a command board, a fire notification device 1 sends an off-hook stop signal to a switching circuit 23-n of an exclusive telephone 2-n for fire notification, disconnects it from a line (L1-L2), and sends a voice signal (line monitor signal) of a voice in the call to a speaker 25-n by the exclusive telephone 2-1 for fire notification.SELECTED DRAWING: Figure 1
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Inventors:
Junki Tabata
Application Number:
JP2018192648A
Publication Date:
December 20, 2022
Filing Date:
October 11, 2018
Export Citation:
Assignee:
Saxa Co., Ltd.
International Classes:
G08B25/08; H04M11/04
Domestic Patent References:
| JP2008017107A | ||||
| JP8251280A |
Attorney, Agent or Firm:
Nemoto Keiji