AU3157089A - Supervision in glass fibre duplex transmission systems - Google Patents

Supervision in glass fibre duplex transmission systems

Info

Publication number
AU3157089A
AU3157089A AU31570/89A AU3157089A AU3157089A AU 3157089 A AU3157089 A AU 3157089A AU 31570/89 A AU31570/89 A AU 31570/89A AU 3157089 A AU3157089 A AU 3157089A AU 3157089 A AU3157089 A AU 3157089A
Authority
AU
Australia
Prior art keywords
supervision
receiving element
glass fibre
transmission systems
signal
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
AU31570/89A
Other versions
AU612247B2 (en
Inventor
Augustin Fuetterer
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of AU3157089A publication Critical patent/AU3157089A/en
Application granted granted Critical
Publication of AU612247B2 publication Critical patent/AU612247B2/en
Anticipated expiration legal-status Critical
Ceased 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2210/00—Indexing scheme relating to optical transmission systems
    • H04B2210/07—Monitoring an optical transmission system using a supervisory signal
    • H04B2210/074—Monitoring an optical transmission system using a supervisory signal using a superposed, over-modulated signal

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)
  • Glass Compositions (AREA)
  • Spectrometry And Color Measurement (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Alarm Systems (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)

Abstract

In fibre-optical transmission in duplex mode using the same wavelength in forward and backward direction, the problem arises that, if an interruption occurs in the transmission path, the transmitter's own transmitted signal appears as a result of reflection in its own receiving element and deceives monitoring circuits provided. To ensure monitoring reliability, the digital signal to be transmitted is converted according to the invention before transmission into a redundant code and at the same time specific code errors which can be detected at the receiving end are inserted at periodic time intervals. In both terminal stations, the received signal is monitored for the occurrence of the specific code errors and an alarm signal is generated if they occur in the receiving element of the transmitting terminal station. <IMAGE>
AU31570/89A 1988-03-22 1989-03-21 Supervision in glass fibre duplex transmission systems Ceased AU612247B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3809601 1988-03-22
DE3809601 1988-03-22

Publications (2)

Publication Number Publication Date
AU3157089A true AU3157089A (en) 1989-09-28
AU612247B2 AU612247B2 (en) 1991-07-04

Family

ID=6350370

Family Applications (1)

Application Number Title Priority Date Filing Date
AU31570/89A Ceased AU612247B2 (en) 1988-03-22 1989-03-21 Supervision in glass fibre duplex transmission systems

Country Status (6)

Country Link
EP (1) EP0334192B1 (en)
AT (1) ATE80254T1 (en)
AU (1) AU612247B2 (en)
DE (1) DE58902171D1 (en)
DK (1) DK139289A (en)
NO (1) NO891217L (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19540046A1 (en) * 1995-10-27 1997-04-30 Asea Brown Boveri Optical fiber transmission system
US6498663B1 (en) * 1999-09-24 2002-12-24 Scientific-Atlanta, Inc. Methods and systems for detecting optical link performance of an optical link in a hybrid fiber coaxial path

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU5361779A (en) * 1978-12-07 1981-06-11 Amalgamated Wireless (Australasia) Limited Testing transmission systems
EP0160748B1 (en) * 1984-05-08 1988-07-13 Siemens Aktiengesellschaft Error code insertion for alphabet code converters
JPS62203435A (en) * 1986-03-03 1987-09-08 Seiko Instr & Electronics Ltd Two-directional optical communication equipment on single transmission line

Also Published As

Publication number Publication date
NO891217L (en) 1989-09-25
AU612247B2 (en) 1991-07-04
EP0334192B1 (en) 1992-09-02
DE58902171D1 (en) 1992-10-08
DK139289D0 (en) 1989-03-21
NO891217D0 (en) 1989-03-20
DK139289A (en) 1989-09-23
ATE80254T1 (en) 1992-09-15
EP0334192A1 (en) 1989-09-27

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