CA1338357C - Transmission line switching system - Google Patents

Transmission line switching system

Info

Publication number
CA1338357C
CA1338357C CA000592808A CA592808A CA1338357C CA 1338357 C CA1338357 C CA 1338357C CA 000592808 A CA000592808 A CA 000592808A CA 592808 A CA592808 A CA 592808A CA 1338357 C CA1338357 C CA 1338357C
Authority
CA
Canada
Prior art keywords
transmission line
terminal repeater
transmission
cable
repeater
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.)
Expired - Fee Related
Application number
CA000592808A
Other languages
English (en)
French (fr)
Inventor
Takeo Fukushima
Kohichi Nishimura
Masumi Kurokawa
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Application granted granted Critical
Publication of CA1338357C publication Critical patent/CA1338357C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/74—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for increasing reliability, e.g. using redundant or spare channels or apparatus
    • H04B1/745—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for increasing reliability, e.g. using redundant or spare channels or apparatus using by-passing or self-healing methods

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Small-Scale Networks (AREA)
CA000592808A 1988-03-09 1989-03-06 Transmission line switching system Expired - Fee Related CA1338357C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP63055325A JPH01228328A (ja) 1988-03-09 1988-03-09 伝送路の回線切替方式
JP63-055325 1988-03-09

Publications (1)

Publication Number Publication Date
CA1338357C true CA1338357C (en) 1996-05-28

Family

ID=12995390

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000592808A Expired - Fee Related CA1338357C (en) 1988-03-09 1989-03-06 Transmission line switching system

Country Status (5)

Country Link
US (1) US5109296A (enExample)
EP (1) EP0332199B1 (enExample)
JP (1) JPH01228328A (enExample)
CA (1) CA1338357C (enExample)
DE (1) DE68920459T2 (enExample)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5313456A (en) * 1989-03-03 1994-05-17 Fujitsu Limited Data link protecting system
JP2558012B2 (ja) * 1990-11-27 1996-11-27 富士通株式会社 通信回線バックアップ方式
JPH04286230A (ja) * 1991-03-14 1992-10-12 Fujitsu Ltd 現用／予備用回線切替方式
JP2528225B2 (ja) * 1991-09-18 1996-08-28 富士通株式会社 伝送路切替方式
US5365359A (en) * 1993-05-14 1994-11-15 Catamount Scientific, Inc. Method for electrically passive self-routing optical multiplexing
US5365512A (en) * 1993-07-02 1994-11-15 Ericsson Ge Mobile Communications Inc. Multisite trunked RF communication system with reliable control messaging network
US5408462A (en) * 1993-10-07 1995-04-18 Adc Telecommunications, Inc. Protection switching apparatus and method
US5946373A (en) * 1996-06-21 1999-08-31 Mci Communications Corporation Topology-based fault analysis in telecommunications networks
US5771274A (en) * 1996-06-21 1998-06-23 Mci Communications Corporation Topology-based fault analysis in telecommunications networks
US6362905B1 (en) * 1997-02-24 2002-03-26 Hitachi, Ltd. Optical crossconnect apparatus and optical transmission system
JP3854372B2 (ja) * 1997-07-03 2006-12-06 株式会社日立コミュニケーションテクノロジー 光クロスコネクト装置
US5887050A (en) * 1997-05-09 1999-03-23 Siemens Building Technologies, Inc. Repeater apparatus having isolation circuit
US6282169B1 (en) * 1999-06-11 2001-08-28 Amplify.Net Inc. Serial redundant bypass control mechanism for maintaining network bandwidth management service
DE10041567A1 (de) * 2000-08-24 2002-03-21 Eichhoff Gmbh Stromversorgungsnetz und Vorrichtung zum Einsatz in eine Koppelstelle eines Stromversorgungsnetzes
JP3671868B2 (ja) * 2001-06-07 2005-07-13 住友金属工業株式会社 高Ｃｒ含有鋼の鋳造方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3882456A (en) * 1972-01-26 1975-05-06 Nippon Electric Co Fault-detecting system for a multi-channel relay system
US3876983A (en) * 1974-04-29 1975-04-08 Ibm Synchronous disconnection and rearrangement
US3864533A (en) * 1973-06-01 1975-02-04 Vidar Corp Automatic line transfer system and method for a communications system
JPS56149851A (en) * 1980-04-23 1981-11-19 Mitsubishi Electric Corp Looplike data transmission equipment
US4347607A (en) * 1980-05-09 1982-08-31 Harris Corporation Voice alarm signalling system
US4449247A (en) * 1980-07-30 1984-05-15 Harris Corporation Local orderwire facility for fiber optic communication system
JPH0614643B2 (ja) * 1983-12-05 1994-02-23 株式会社日立製作所 ル−プ式デ−タ伝送システムの障害回復検出方法
US4630268A (en) * 1984-08-30 1986-12-16 Rockwell International Corporation Communication circuit loopback test apparatus
US4688260A (en) * 1985-10-09 1987-08-18 Westinghouse Electric Corp. High-reliability fiber optic repeater
JPS62219720A (ja) * 1986-03-20 1987-09-28 Nec Corp 伝送路切替方式

Also Published As

Publication number Publication date
JPH0559617B2 (enExample) 1993-08-31
US5109296A (en) 1992-04-28
JPH01228328A (ja) 1989-09-12
EP0332199B1 (en) 1995-01-11
DE68920459T2 (de) 1995-06-14
EP0332199A3 (en) 1991-03-20
EP0332199A2 (en) 1989-09-13
DE68920459D1 (de) 1995-02-23

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Legal Events

Date Code Title Description
MKLA Lapsed
MKLA Lapsed

Effective date: 20010528