JPH04249959A - Remote supervisory system - Google Patents

Remote supervisory system

Info

Publication number
JPH04249959A
JPH04249959A JP33223690A JP33223690A JPH04249959A JP H04249959 A JPH04249959 A JP H04249959A JP 33223690 A JP33223690 A JP 33223690A JP 33223690 A JP33223690 A JP 33223690A JP H04249959 A JPH04249959 A JP H04249959A
Authority
JP
Japan
Prior art keywords
remote supervisory
master
telephone line
line
check
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
JP33223690A
Other languages
Japanese (ja)
Inventor
Shinji Ishii
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP33223690A priority Critical patent/JPH04249959A/en
Publication of JPH04249959A publication Critical patent/JPH04249959A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To attain the self-check by bringing the operation into the telephone line self-check operation for each prescribed period, bringing other remote supervisory equipment into the self-check operation through inter-equipment transmission and connecting a telephone line interface.
CONSTITUTION: A call from a telephone network reaches only a remote supervisory equipment 30a as a master set via a line disconnection relay contact Q connecting in series with a telephone line 4. Moreover, a remote supervisory equipment 30b as a slave set is connected in parallel with the telephone line 4 via the line disconnecting relay contact Q at a master set. Then the master set 30a is connected based on the communication via an inter-equipment transmission interface 35 and the control of the line connection control relay contact P for each prescribed time by the master set 30a and the telephone line is checked between the remote supervisory equipments 30a,3Ob in a same building.
COPYRIGHT: (C)1992,JPO&Japio
JP33223690A 1990-11-29 1990-11-29 Remote supervisory system Pending JPH04249959A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP33223690A JPH04249959A (en) 1990-11-29 1990-11-29 Remote supervisory system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP33223690A JPH04249959A (en) 1990-11-29 1990-11-29 Remote supervisory system

Publications (1)

Publication Number Publication Date
JPH04249959A true JPH04249959A (en) 1992-09-04

Family

ID=18252703

Family Applications (1)

Application Number Title Priority Date Filing Date
JP33223690A Pending JPH04249959A (en) 1990-11-29 1990-11-29 Remote supervisory system

Country Status (1)

Country Link
JP (1) JPH04249959A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005084863A (en) * 2003-09-08 2005-03-31 Saxa Inc Monitoring/reporting system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005084863A (en) * 2003-09-08 2005-03-31 Saxa Inc Monitoring/reporting system

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