JPS6225529A - Diagnostic method for duplicated transmission line - Google Patents

Diagnostic method for duplicated transmission line

Info

Publication number
JPS6225529A
JPS6225529A JP16553485A JP16553485A JPS6225529A JP S6225529 A JPS6225529 A JP S6225529A JP 16553485 A JP16553485 A JP 16553485A JP 16553485 A JP16553485 A JP 16553485A JP S6225529 A JPS6225529 A JP S6225529A
Authority
JP
Japan
Prior art keywords
carrier
transmission line
fault
transmission lines
circuits
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
JP16553485A
Other languages
Japanese (ja)
Other versions
JPH0669178B2 (en
Inventor
Shigeo Nanbu
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.)
Toshiba Corp
Original Assignee
Toshiba 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 Toshiba Corp filed Critical Toshiba Corp
Priority to JP16553485A priority Critical patent/JPH0669178B2/en
Priority claimed from US06/889,627 external-priority patent/US4747115A/en
Publication of JPS6225529A publication Critical patent/JPS6225529A/en
Publication of JPH0669178B2 publication Critical patent/JPH0669178B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

PURPOSE: To detect automatically a fault at one side of duplicated transmission lines by detecting the presence of a carrier of the transmission lines at each slot and discriminating it as a fault if the carrier of the one transmission line is missing.
CONSTITUTION: Serial interfaces 3, 4 including a carrier detection circuit are connected to an active system transmission line 1 and a standby system transmission line 2. Then a carrier sense output XCD of the interfaces 3, 4 is inputted to a carrier discrimination circuit 9. When a carrier signal exists in both the transmission lines 1, 2 at a time slot, a signal having a faster leading in both the signals activates a one-shot timer 6 and AND circuits 7-1, 7-2 discriminate the coincidence of the carrier. When the signal exists in one of them only, one of the AND circuits 7-1, 7-2 goes to '1' level and a FF 10-1 or 10-2 is set to detect a fault.
COPYRIGHT: (C)1987,JPO&Japio
JP16553485A 1985-07-26 1985-07-26 Redundant line diagnostic method Expired - Lifetime JPH0669178B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16553485A JPH0669178B2 (en) 1985-07-26 1985-07-26 Redundant line diagnostic method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP16553485A JPH0669178B2 (en) 1985-07-26 1985-07-26 Redundant line diagnostic method
US06/889,627 US4747115A (en) 1985-07-26 1986-07-28 Bus-redundancy type apparatus for a transmitting system

Publications (2)

Publication Number Publication Date
JPS6225529A true JPS6225529A (en) 1987-02-03
JPH0669178B2 JPH0669178B2 (en) 1994-08-31

Family

ID=15814214

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16553485A Expired - Lifetime JPH0669178B2 (en) 1985-07-26 1985-07-26 Redundant line diagnostic method

Country Status (1)

Country Link
JP (1) JPH0669178B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0260338A (en) * 1988-08-26 1990-02-28 Omron Tateisi Electron Co Bus type lan
JPH0260339A (en) * 1988-08-26 1990-02-28 Omron Tateisi Electron Co Bus type lan
JPH02215938A (en) * 1989-02-16 1990-08-28 Fuji Heavy Ind Ltd Operating controller for garbage truck
JPH03112727A (en) * 1989-09-27 1991-05-14 Kyokuto Kaihatsu Kogyo Co Ltd Drive device for work vehicle

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5862949A (en) * 1981-10-09 1983-04-14 Toshiba Corp Duplex system for data line
JPS6091740A (en) * 1983-09-28 1985-05-23 Siemens Ag Method and circuit for recognizing defect of redanduncy light transmitting system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5862949A (en) * 1981-10-09 1983-04-14 Toshiba Corp Duplex system for data line
JPS6091740A (en) * 1983-09-28 1985-05-23 Siemens Ag Method and circuit for recognizing defect of redanduncy light transmitting system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0260338A (en) * 1988-08-26 1990-02-28 Omron Tateisi Electron Co Bus type lan
JPH0260339A (en) * 1988-08-26 1990-02-28 Omron Tateisi Electron Co Bus type lan
JPH02215938A (en) * 1989-02-16 1990-08-28 Fuji Heavy Ind Ltd Operating controller for garbage truck
JPH03112727A (en) * 1989-09-27 1991-05-14 Kyokuto Kaihatsu Kogyo Co Ltd Drive device for work vehicle

Also Published As

Publication number Publication date
JPH0669178B2 (en) 1994-08-31

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Legal Events

Date Code Title Description
EXPY Cancellation because of completion of term