Title:
ABNORMALITY NOTIFYING DEVICE
Document Type and Number:
Japanese Patent JP3107647
Kind Code:
B2
Abstract:
PURPOSE: To make it possible to perform a calling by a monitoring station without disconnecting a pertinent telephone line even when the line connected with an abnormality notifying device automatically notifying abnormal information to the monitoring station by utilizing the telephone line is busy, regarding this abnormality notifying device.
CONSTITUTION: This abnormality notifying device is provided with a busy detection means 4 detecting the busy state of a pertinent telephone line, a discrimination means 3 detecting the calling request for abnormal information and selecting a notifying form according to the call state of the pertinent telephone line, an inter-multiparty communication means 5 forming an inter-multiparty communication line in response to the discrimination signal for the notification form from the discrimination means 3 and an automatic calling means 6 transmitting a calling signal to a monitoring station via the inter-multiparty communication line. Further, the device is provided with a response detection means 7 detecting the response signal from the monitoring station for the calling signal. After the response signal is detected, abnormal information is notified via the pertinent line and the pertinent line is recovered to its original state after the notification is terminated.
Inventors:
Takashi Nakashima
Toshinori Nakamura
Toshinori Nakamura
Application Number:
JP15064692A
Publication Date:
November 13, 2000
Filing Date:
June 10, 1992
Export Citation:
Assignee:
Secom Co., Ltd.
International Classes:
G08B25/08; H04M11/04; (IPC1-7): H04M11/04
Domestic Patent References:
| JP2188057A | ||||
| JP522469A |
Attorney, Agent or Firm:
Aoki Akira (4 outside)