JPS62281545A - System for detecting fault in communication line - Google Patents

System for detecting fault in communication line

Info

Publication number
JPS62281545A
JPS62281545A JP61124107A JP12410786A JPS62281545A JP S62281545 A JPS62281545 A JP S62281545A JP 61124107 A JP61124107 A JP 61124107A JP 12410786 A JP12410786 A JP 12410786A JP S62281545 A JPS62281545 A JP S62281545A
Authority
JP
Japan
Prior art keywords
communication line
fault
polling signal
detecting fault
detect
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
JP61124107A
Other languages
Japanese (ja)
Inventor
Hisao Kono
Hiroshi Matsuyama
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP61124107A priority Critical patent/JPS62281545A/en
Publication of JPS62281545A publication Critical patent/JPS62281545A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To detect a fault of a communication line even at a slave device by supervising whether or not a polling signal is reached within a predetermined period via a duplexed communication line.
CONSTITUTION: When polling signal analysis sections 22,25 detect a polling signal P from a master equipment 1 via an outgoing communication line 31 or 41 in the slave equipment 2, the reception of the polling signal P is informed to a corresponding fault detection section 27 or 28. The fault detection sections 27, 28 do not receive the reception notice of the polling signal P from the master equipment 1 even once in the interval of the timing signal sent from the timing section 29, it is decided that a fault is generated in a corresponding communication line 3 or 4 to display the occurrence of the fault.
COPYRIGHT: (C)1987,JPO&Japio
JP61124107A 1986-05-29 1986-05-29 System for detecting fault in communication line Pending JPS62281545A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP61124107A JPS62281545A (en) 1986-05-29 1986-05-29 System for detecting fault in communication line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61124107A JPS62281545A (en) 1986-05-29 1986-05-29 System for detecting fault in communication line

Publications (1)

Publication Number Publication Date
JPS62281545A true JPS62281545A (en) 1987-12-07

Family

ID=14877091

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61124107A Pending JPS62281545A (en) 1986-05-29 1986-05-29 System for detecting fault in communication line

Country Status (1)

Country Link
JP (1) JPS62281545A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01175331A (en) * 1987-12-29 1989-07-11 Fujitsu Ltd Line duplicating terminal device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01175331A (en) * 1987-12-29 1989-07-11 Fujitsu Ltd Line duplicating terminal device

Similar Documents

Publication Publication Date Title
JPS62281545A (en) System for detecting fault in communication line
JPH0231298A (en) Automatic announcing equipment
JPH02168394A (en) Disaster prevention monitoring device
JPH01170243A (en) Fault supervision system for local area network
JPS63246946A (en) Fault detection system for communication equipment in loop structure network
JPS62171344A (en) Occupation prevention system for modem circuit
JPH04266200A (en) Abnormality monitor
JPH03140083A (en) Dial pulse measuring system
JPH02279040A (en) Fault detection system for multi-processor system
JPH0376332A (en) Time division multiplexer
JPH02215259A (en) Line omission system interphone device
JPH04336632A (en) Fault detection system for shared storage system
JPH0477157A (en) Monitoring system
JPH0272742A (en) Data error location detecting system
JPH0376341A (en) Monitor
JPH01170244A (en) Fault supervision system for local area network
JPH01181263A (en) Alarm system
JPS6243245A (en) Charging monitor system
JPH0329086A (en) Disaster prevention system
JPS6268338A (en) Polling control system for pos system
JPS62164399A (en) Remote supervisory system
JPH03222096A (en) Fire alarm system with operation testing function and analog sensor used therein
JPH01136442A (en) Driver control system
JPH023894A (en) Fire informing device
JPH02299336A (en) Transmission line monitoring device