JPH0559617B2 - - Google Patents

Info

Publication number
JPH0559617B2
JPH0559617B2 JP63055325A JP5532588A JPH0559617B2 JP H0559617 B2 JPH0559617 B2 JP H0559617B2 JP 63055325 A JP63055325 A JP 63055325A JP 5532588 A JP5532588 A JP 5532588A JP H0559617 B2 JPH0559617 B2 JP H0559617B2
Authority
JP
Japan
Prior art keywords
transmission
line
transmission line
cable
line switching
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 - Lifetime
Application number
JP63055325A
Other languages
English (en)
Japanese (ja)
Other versions
JPH01228328A (ja
Inventor
Takeo Fukushima
Koichi 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
Priority to JP63055325A priority Critical patent/JPH01228328A/ja
Priority to CA000592808A priority patent/CA1338357C/en
Priority to EP89104219A priority patent/EP0332199B1/en
Priority to DE68920459T priority patent/DE68920459T2/de
Publication of JPH01228328A publication Critical patent/JPH01228328A/ja
Priority to US07/698,179 priority patent/US5109296A/en
Publication of JPH0559617B2 publication Critical patent/JPH0559617B2/ja
Granted 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)
JP63055325A 1988-03-09 1988-03-09 伝送路の回線切替方式 Granted JPH01228328A (ja)

Priority Applications (5)

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
CA000592808A CA1338357C (en) 1988-03-09 1989-03-06 Transmission line switching system
EP89104219A EP0332199B1 (en) 1988-03-09 1989-03-09 Transmission line switching system
DE68920459T DE68920459T2 (de) 1988-03-09 1989-03-09 Umschaltungseinrichtung für Übertragungsleitungen.
US07/698,179 US5109296A (en) 1988-03-09 1991-04-29 Transmission line switching system

Applications Claiming Priority (1)

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

Publications (2)

Publication Number Publication Date
JPH01228328A JPH01228328A (ja) 1989-09-12
JPH0559617B2 true JPH0559617B2 (enExample) 1993-08-31

Family

ID=12995390

Family Applications (1)

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

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)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002361372A (ja) * 2001-06-07 2002-12-17 Sumitomo Metal Ind Ltd 高Ｃｒ含有鋼の鋳造方法

Families Citing this family (14)

* 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

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002361372A (ja) * 2001-06-07 2002-12-17 Sumitomo Metal Ind Ltd 高Ｃｒ含有鋼の鋳造方法

Also Published As

Publication number Publication date
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
CA1338357C (en) 1996-05-28

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