NO891217L - MONITORING IN DUPLEX TRANSMISSION SYSTEM BASED ON GLASS FIBER. - Google Patents

MONITORING IN DUPLEX TRANSMISSION SYSTEM BASED ON GLASS FIBER.

Info

Publication number
NO891217L
NO891217L NO89891217A NO891217A NO891217L NO 891217 L NO891217 L NO 891217L NO 89891217 A NO89891217 A NO 89891217A NO 891217 A NO891217 A NO 891217A NO 891217 L NO891217 L NO 891217L
Authority
NO
Norway
Prior art keywords
monitoring
receiving element
transmission system
glass fiber
system based
Prior art date
Application number
NO89891217A
Other languages
Norwegian (no)
Other versions
NO891217D0 (en
Inventor
Augustin Fuetterer
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 NO891217D0 publication Critical patent/NO891217D0/en
Publication of NO891217L publication Critical patent/NO891217L/en

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>
NO89891217A 1988-03-22 1989-03-20 MONITORING IN DUPLEX TRANSMISSION SYSTEM BASED ON GLASS FIBER. NO891217L (en)

Applications Claiming Priority (1)

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

Publications (2)

Publication Number Publication Date
NO891217D0 NO891217D0 (en) 1989-03-20
NO891217L true NO891217L (en) 1989-09-25

Family

ID=6350370

Family Applications (1)

Application Number Title Priority Date Filing Date
NO89891217A NO891217L (en) 1988-03-22 1989-03-20 MONITORING IN DUPLEX TRANSMISSION SYSTEM BASED ON GLASS FIBER.

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
DE3472743D1 (en) * 1984-05-08 1988-08-18 Siemens Ag 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
NO891217D0 (en) 1989-03-20
DE58902171D1 (en) 1992-10-08
EP0334192B1 (en) 1992-09-02
DK139289A (en) 1989-09-23
AU612247B2 (en) 1991-07-04
EP0334192A1 (en) 1989-09-27
DK139289D0 (en) 1989-03-21
AU3157089A (en) 1989-09-28
ATE80254T1 (en) 1992-09-15

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