JPH04101520A - Line disconnection monitoring system - Google Patents

Line disconnection monitoring system

Info

Publication number
JPH04101520A
JPH04101520A JP21920090A JP21920090A JPH04101520A JP H04101520 A JPH04101520 A JP H04101520A JP 21920090 A JP21920090 A JP 21920090A JP 21920090 A JP21920090 A JP 21920090A JP H04101520 A JPH04101520 A JP H04101520A
Authority
JP
Japan
Prior art keywords
line disconnection
particular pattern
detected
station
signal
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
JP21920090A
Other languages
Japanese (ja)
Inventor
Eiichi Kobayashi
Shinsuke Torii
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.)
NEC Engineering Ltd
Original Assignee
NEC Engineering Ltd
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 NEC Engineering Ltd filed Critical NEC Engineering Ltd
Priority to JP21920090A priority Critical patent/JPH04101520A/en
Publication of JPH04101520A publication Critical patent/JPH04101520A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To detect a transmission failure at two stations by providing a method that when the first particular pattern is not detected the second particular pattern as line disconnection detecting information and that when the second particular pattern is detected at the sending station the pattern is judged as alarm from the party's station.
CONSTITUTION: When the first particular pattern is contained in an output signal i of equalizer 20, line disconnection detecting signal d mains a low level, otherwise, the signal changes to high level. Accordingly, when line disconnection is caused by a transmission line failure, the first particular pattern is not detected and the line disconnection can be detected by minitoring the line disconnection detecting signal d. Further, the line disconnection detecting signal d is supplied to a particular pattern setting circuit 15, and when the line disconnection is detected by the receiving section of local station, the second particular pattern is send out to the party's station. When the second particular pattern is detected, party's station alarm signal e changes from low level to high level.
COPYRIGHT: (C)1992,JPO&Japio
JP21920090A 1990-08-21 1990-08-21 Line disconnection monitoring system Pending JPH04101520A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21920090A JPH04101520A (en) 1990-08-21 1990-08-21 Line disconnection monitoring system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21920090A JPH04101520A (en) 1990-08-21 1990-08-21 Line disconnection monitoring system

Publications (1)

Publication Number Publication Date
JPH04101520A true JPH04101520A (en) 1992-04-03

Family

ID=16731777

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21920090A Pending JPH04101520A (en) 1990-08-21 1990-08-21 Line disconnection monitoring system

Country Status (1)

Country Link
JP (1) JPH04101520A (en)

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