JPH01276858A - Communication adaptor - Google Patents

Communication adaptor

Info

Publication number
JPH01276858A
JPH01276858A JP10491588A JP10491588A JPH01276858A JP H01276858 A JPH01276858 A JP H01276858A JP 10491588 A JP10491588 A JP 10491588A JP 10491588 A JP10491588 A JP 10491588A JP H01276858 A JPH01276858 A JP H01276858A
Authority
JP
Japan
Prior art keywords
communication
turning
non
opponent
line
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.)
Granted
Application number
JP10491588A
Inventor
Toshiyuki Onaka
Original Assignee
Nec 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 Nec Corp filed Critical Nec Corp
Priority to JP10491588A priority Critical patent/JPH01276858A/en
Publication of JPH01276858A publication Critical patent/JPH01276858A/en
Application status is Granted legal-status Critical

Links

Abstract

PURPOSE: To quickly complete communication at the time of the line abnormality turning-off while communication data are not present by providing a non- communication supervising means and an opponent response confirming means at a link layer.
CONSTITUTION: A supervising means 9 to detect that the non-communication condition of a frame given and received with an opponent device by a link layer is continued over a prescribed time and a confirming means 10 to send a command to request the response to show the non-communication condition due to the line abnormality turning-off of an opponent device in accordance with the detection by the supervising means 9, over the specified number of the times are provided. When a response to show the non-communication condition due to the line abnormality turning-off of the opponent device does not arrive after a command is sent over the specified number of times, its own device issues a command to make a line connected to the opponent device into an open circuit condition. Thus, the abnormality turning-off of the line to occur while the communication data are not present is detected and the communication can be completed.
COPYRIGHT: (C)1989,JPO&Japio
JP10491588A 1988-04-27 1988-04-27 Communication adaptor Granted JPH01276858A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10491588A JPH01276858A (en) 1988-04-27 1988-04-27 Communication adaptor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10491588A JPH01276858A (en) 1988-04-27 1988-04-27 Communication adaptor

Publications (1)

Publication Number Publication Date
JPH01276858A true JPH01276858A (en) 1989-11-07

Family

ID=14393400

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10491588A Granted JPH01276858A (en) 1988-04-27 1988-04-27 Communication adaptor

Country Status (1)

Country Link
JP (1) JPH01276858A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007043281A (en) * 2005-08-01 2007-02-15 Furuno Electric Co Ltd Network system, communication repeating apparatus, communication terminal, and program for communication terminal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007043281A (en) * 2005-08-01 2007-02-15 Furuno Electric Co Ltd Network system, communication repeating apparatus, communication terminal, and program for communication terminal

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