CA2076996A1 - Transmission line switching devices capable of switching to a redundant system when a failure occurs in the system path - Google Patents

Transmission line switching devices capable of switching to a redundant system when a failure occurs in the system path

Info

Publication number
CA2076996A1
CA2076996A1 CA 2076996 CA2076996A CA2076996A1 CA 2076996 A1 CA2076996 A1 CA 2076996A1 CA 2076996 CA2076996 CA 2076996 CA 2076996 A CA2076996 A CA 2076996A CA 2076996 A1 CA2076996 A1 CA 2076996A1
Authority
CA
Canada
Prior art keywords
transmission line
failure occurs
node
switching
devices capable
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
CA 2076996
Other languages
French (fr)
Other versions
CA2076996C (en
Inventor
Yoshihiro Naka
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 Corp
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2076996A1 publication Critical patent/CA2076996A1/en
Application granted granted Critical
Publication of CA2076996C publication Critical patent/CA2076996C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

A transmission line switching device built into each of a plurality of nodes which connect a transmission line in a ring network configuration. The switching device has a matrix switch 30 for changing the conductive state of a node such that signals being transmitted through the ring network are either transmitted through the node or terminated at the node.
Loopback switches, which are separated from the matrix switch, change the conductive state of the node such that a loopback connection is configured to recover the transmission path of the ring network when a failure occurs in a section of the ring network.
CA 2076996 1991-08-28 1992-08-27 Transmission line switching devices capable of switching to a redundant system when a failure occurs in the system path Expired - Fee Related CA2076996C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP21757791A JP2697395B2 (en) 1991-08-28 1991-08-28 Transmission line switching device
JP217577/1991 1991-08-28

Publications (2)

Publication Number Publication Date
CA2076996A1 true CA2076996A1 (en) 1993-03-01
CA2076996C CA2076996C (en) 1999-12-07

Family

ID=16706463

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2076996 Expired - Fee Related CA2076996C (en) 1991-08-28 1992-08-27 Transmission line switching devices capable of switching to a redundant system when a failure occurs in the system path

Country Status (2)

Country Link
JP (1) JP2697395B2 (en)
CA (1) CA2076996C (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07162903A (en) * 1993-12-08 1995-06-23 Nec Corp Terminal equipment
TW353838B (en) 1996-11-12 1999-03-01 Toshiba Corp Ring network system and control method of its communication path
JP2009296230A (en) * 2008-06-04 2009-12-17 Nec Corp Transmission network, transmission apparatus, channel switching method and program for transmission network

Also Published As

Publication number Publication date
JPH0563601A (en) 1993-03-12
CA2076996C (en) 1999-12-07
JP2697395B2 (en) 1998-01-14

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