GB9325005D0 - Network surveillance - Google Patents

Network surveillance

Info

Publication number
GB9325005D0
GB9325005D0 GB939325005A GB9325005A GB9325005D0 GB 9325005 D0 GB9325005 D0 GB 9325005D0 GB 939325005 A GB939325005 A GB 939325005A GB 9325005 A GB9325005 A GB 9325005A GB 9325005 D0 GB9325005 D0 GB 9325005D0
Authority
GB
United Kingdom
Prior art keywords
link
optical
degradation
transmitting
independent
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.)
Withdrawn
Application number
GB939325005A
Other versions
GB2285192A (en
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.)
Nortel Networks Ltd
Original Assignee
Northern Telecom 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 Northern Telecom Ltd filed Critical Northern Telecom Ltd
Priority to GB9325005A priority Critical patent/GB2285192A/en
Publication of GB9325005D0 publication Critical patent/GB9325005D0/en
Publication of GB2285192A publication Critical patent/GB2285192A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
    • H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
    • H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
    • H04B10/0795—Performance monitoring; Measurement of transmission parameters
    • H04B10/07953—Monitoring or measuring OSNR, BER or Q
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2210/00—Indexing scheme relating to optical transmission systems
    • H04B2210/08—Shut-down or eye-safety

Abstract

An arrangement for transmitting alarm signals generated at one end of an optical fibre telecommunications link to the other end of the link, which optical link includes an independent end-to-end supervisory channel 10b, the arrangement including means 14b at a line terminating equipment 12b for detecting failure or degradation of optical signals received at the terminating equipment, means for generating an alarm signal in response to detection of said failure or degradation of the optical signals and means for transmitting said alarm signal to the remote end of the link via the independent supervisory channel. <IMAGE>
GB9325005A 1993-12-07 1993-12-07 Network surveillance Withdrawn GB2285192A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9325005A GB2285192A (en) 1993-12-07 1993-12-07 Network surveillance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9325005A GB2285192A (en) 1993-12-07 1993-12-07 Network surveillance

Publications (2)

Publication Number Publication Date
GB9325005D0 true GB9325005D0 (en) 1994-02-02
GB2285192A GB2285192A (en) 1995-06-28

Family

ID=10746214

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9325005A Withdrawn GB2285192A (en) 1993-12-07 1993-12-07 Network surveillance

Country Status (1)

Country Link
GB (1) GB2285192A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9615036D0 (en) * 1996-07-17 1996-09-04 Northern Telecom Ltd Optical interference measurement method and system

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2069261B (en) * 1979-05-18 1983-03-02 Standard Telephones Cables Ltd Fibre optic signalling
US4347607A (en) * 1980-05-09 1982-08-31 Harris Corporation Voice alarm signalling system
US4646286A (en) * 1985-07-30 1987-02-24 Northern Telecom Limited Communications system with protection switching and channel identities
GB8709900D0 (en) * 1987-04-27 1987-08-05 British Telecomm Surveillance system
JPH02209030A (en) * 1989-02-09 1990-08-20 Fujitsu Ltd Optical transmission line equipment
US5150243A (en) * 1989-06-12 1992-09-22 Fujitsu Limited Method and apparatus for monitoring an optical network interface
DE4109683A1 (en) * 1991-03-23 1992-09-24 Standard Elektrik Lorenz Ag SYSTEM FOR OPTICAL SIGNAL TRANSMISSION, IN PARTICULAR OPTICAL CABLE TELEVISION SYSTEM, WITH MONITORING AND SERVICE CHANNEL DEVICE

Also Published As

Publication number Publication date
GB2285192A (en) 1995-06-28

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)