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GB2012526A - Digital transmission substitution systems - Google Patents

Digital transmission substitution systems

Info

Publication number
GB2012526A
GB2012526A GB7846438A GB7846438A GB2012526A GB 2012526 A GB2012526 A GB 2012526A GB 7846438 A GB7846438 A GB 7846438A GB 7846438 A GB7846438 A GB 7846438A GB 2012526 A GB2012526 A GB 2012526A
Authority
GB
United Kingdom
Prior art keywords
substitution
digital
systems
transmission
control device
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
GB7846438A
Other versions
GB2012526B (en
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 GB2012526A publication Critical patent/GB2012526A/en
Application granted granted Critical
Publication of GB2012526B publication Critical patent/GB2012526B/en
Expired 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Maintenance And Management Of Digital Transmission (AREA)
  • Time-Division Multiplex Systems (AREA)

Abstract

The invention relates to digital transmission substitution systems in which a digital communications connection can be transferred from a fault system to a correctly operating substitute system. When substitutions of this kind are to be effected, particularly in digital systems having a high bit transmission rate, the problem occurs of keeping the switchover time as short as possible so as to minimise disturbances in transmission. In addition there is the problem of avoiding the need for additional control lines between stations for the execution of the substitution. In a terminal station for such a system there is provided a selectively operated switching arrangement for effecting substitution and controlled by a control device arranged to transmit and receive via the substitute system information additional to the communications signal and indicative of, and providing control of, the substitution. The control device is activated in the event of a fault signal being emitted by a line terminal device. <IMAGE>
GB7846438A 1977-11-30 1978-11-29 Digital transmission substitution systems Expired GB2012526B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2753420A DE2753420C3 (en) 1977-11-30 1977-11-30 Device for equivalent switching of operating systems for digital signals

Publications (2)

Publication Number Publication Date
GB2012526A true GB2012526A (en) 1979-07-25
GB2012526B GB2012526B (en) 1982-03-10

Family

ID=6025003

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7846438A Expired GB2012526B (en) 1977-11-30 1978-11-29 Digital transmission substitution systems

Country Status (6)

Country Link
JP (1) JPS584503B2 (en)
DE (1) DE2753420C3 (en)
FR (1) FR2410918A1 (en)
GB (1) GB2012526B (en)
IT (1) IT1100376B (en)
NL (1) NL183377C (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4853927A (en) * 1986-12-10 1989-08-01 U.S. Philips Corporation Method and circuit arrangement for decentralized controlled transmission rerouting
US4961180A (en) * 1985-07-20 1990-10-02 U.S. Philips Corporation Arrangements for producing and recognizing information identifying non-occupied transmission paths in a digital transmission system
GB2232859A (en) * 1989-05-25 1990-12-19 Bicc Plc Data networks
GB2267415A (en) * 1992-05-19 1993-12-01 Sony Broadcast & Communication Signal switching
EP0823745A2 (en) * 1996-08-09 1998-02-11 KMW Co., Ltd. Multipole multiposition microwave switch with a common redundancy
GB2345422A (en) * 1998-12-31 2000-07-05 Inventec Corp Method for data serial transfer

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5484403A (en) * 1977-12-19 1979-07-05 Hitachi Ltd Double system transmission line switching system
DE2939253A1 (en) * 1979-09-27 1981-04-30 Siemens AG, 1000 Berlin und 8000 München Multiple redundant data transmission system - uses test signal to control change-over of transmission lines if line failure occurs
DE3330683A1 (en) * 1983-08-25 1985-03-14 Siemens AG, 1000 Berlin und 8000 München TRANSMISSION SYSTEM FOR DIGITAL SIGNALS, HIGH STEP-SPEED WITH ADDITIONAL SIGNAL TRANSMISSION
DE3474893D1 (en) * 1983-11-11 1988-12-01 Fujitsu Ltd Protection switching system for carrier transmission line
US4646286A (en) * 1985-07-30 1987-02-24 Northern Telecom Limited Communications system with protection switching and channel identities
JP3115676B2 (en) * 1992-02-12 2000-12-11 富士通株式会社 Apparatus and method for automatically switching signal system of subscriber digital transmission apparatus
US6631018B1 (en) 1997-08-27 2003-10-07 Nortel Networks Limited WDM optical network with passive pass-through at each node

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4961180A (en) * 1985-07-20 1990-10-02 U.S. Philips Corporation Arrangements for producing and recognizing information identifying non-occupied transmission paths in a digital transmission system
US4853927A (en) * 1986-12-10 1989-08-01 U.S. Philips Corporation Method and circuit arrangement for decentralized controlled transmission rerouting
GB2232859A (en) * 1989-05-25 1990-12-19 Bicc Plc Data networks
US5115449A (en) * 1989-05-25 1992-05-19 Lockyer Terence D Data networks
GB2232859B (en) * 1989-05-25 1993-10-20 Bicc Plc Data networks
US5387902A (en) * 1989-05-25 1995-02-07 3Com Ireland Data networks
GB2267415A (en) * 1992-05-19 1993-12-01 Sony Broadcast & Communication Signal switching
GB2267415B (en) * 1992-05-19 1996-02-07 Sony Broadcast & Communication Signal switching
EP0823745A2 (en) * 1996-08-09 1998-02-11 KMW Co., Ltd. Multipole multiposition microwave switch with a common redundancy
EP0823745A3 (en) * 1996-08-09 1999-06-16 KMW Co., Ltd. Multipole multiposition microwave switch with a common redundancy
GB2345422A (en) * 1998-12-31 2000-07-05 Inventec Corp Method for data serial transfer

Also Published As

Publication number Publication date
DE2753420B2 (en) 1979-10-04
FR2410918A1 (en) 1979-06-29
DE2753420A1 (en) 1979-06-07
IT7830132A0 (en) 1978-11-24
NL183377C (en) 1988-10-03
GB2012526B (en) 1982-03-10
NL183377B (en) 1988-05-02
JPS54100208A (en) 1979-08-07
JPS584503B2 (en) 1983-01-26
DE2753420C3 (en) 1980-06-19
IT1100376B (en) 1985-09-28
NL7811771A (en) 1979-06-01
FR2410918B1 (en) 1984-01-20

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19931129