CA2012388A1 - Systeme de transmission radio numerique - Google Patents

Systeme de transmission radio numerique

Info

Publication number
CA2012388A1
CA2012388A1 CA2012388A CA2012388A CA2012388A1 CA 2012388 A1 CA2012388 A1 CA 2012388A1 CA 2012388 A CA2012388 A CA 2012388A CA 2012388 A CA2012388 A CA 2012388A CA 2012388 A1 CA2012388 A1 CA 2012388A1
Authority
CA
Canada
Prior art keywords
lines
line
office
long distance
protection
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
CA2012388A
Other languages
English (en)
Other versions
CA2012388C (fr
Inventor
Toshio Nakajima
Kazutoshi Kawamura
Teruo Mizumoto
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
Individual
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
Priority claimed from JP6906589A external-priority patent/JPH02248127A/ja
Priority claimed from JP21560289A external-priority patent/JPH0787402B2/ja
Priority claimed from JP21709789A external-priority patent/JPH0380632A/ja
Application filed by Individual filed Critical Individual
Publication of CA2012388A1 publication Critical patent/CA2012388A1/fr
Application granted granted Critical
Publication of CA2012388C publication Critical patent/CA2012388C/fr
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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/12—Arrangements for observation, testing or troubleshooting

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
CA002012388A 1989-03-20 1990-03-16 Systeme de transmission radio numerique Expired - Fee Related CA2012388C (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP01-069065 1989-03-20
JP6906589A JPH02248127A (ja) 1989-03-20 1989-03-20 デジタル無線方式におけるドロップインサーション局を含むｎ＋１回線切替制御方式
JP01-215602 1989-08-22
JP21560289A JPH0787402B2 (ja) 1989-08-22 1989-08-22 回線切替方式
JP01-217097 1989-08-23
JP21709789A JPH0380632A (ja) 1989-08-23 1989-08-23 ドロップ／インサーション局を含むディジタル無線回線の優先付切替制御方式

Publications (2)

Publication Number Publication Date
CA2012388A1 true CA2012388A1 (fr) 1990-09-20
CA2012388C CA2012388C (fr) 1995-02-21

Family

ID=27299942

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002012388A Expired - Fee Related CA2012388C (fr) 1989-03-20 1990-03-16 Systeme de transmission radio numerique

Country Status (2)

Country Link
EP (1) EP0388893A3 (fr)
CA (1) CA2012388C (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0142138B1 (fr) * 1983-11-11 1988-10-26 Fujitsu Limited Système de commutation sur réserve pour une ligne de transmission de porteuse
JPS6226944A (ja) * 1985-07-26 1987-02-04 Nec Corp 回線制御方式
JPS6469127A (en) * 1987-09-10 1989-03-15 Fujitsu Ltd High speed switching system

Also Published As

Publication number Publication date
EP0388893A3 (fr) 1992-09-02
CA2012388C (fr) 1995-02-21
EP0388893A2 (fr) 1990-09-26

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed
MKLA Lapsed

Effective date: 19960917