EP0752178A1 - Ersatzschalung für sdh einfüge/ausfüge multiplexer - Google Patents

Ersatzschalung für sdh einfüge/ausfüge multiplexer

Info

Publication number
EP0752178A1
EP0752178A1 EP95911448A EP95911448A EP0752178A1 EP 0752178 A1 EP0752178 A1 EP 0752178A1 EP 95911448 A EP95911448 A EP 95911448A EP 95911448 A EP95911448 A EP 95911448A EP 0752178 A1 EP0752178 A1 EP 0752178A1
Authority
EP
European Patent Office
Prior art keywords
card
tributary
protection
faulty
cards
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.)
Withdrawn
Application number
EP95911448A
Other languages
English (en)
French (fr)
Inventor
Andrew James Barker
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.)
GPT Ltd
Plessey Telecommunications Ltd
Original Assignee
GPT Ltd
Plessey Telecommunications 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 GPT Ltd, Plessey Telecommunications Ltd filed Critical GPT Ltd
Publication of EP0752178A1 publication Critical patent/EP0752178A1/de
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/14—Monitoring arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/08—Intermediate station arrangements, e.g. for branching, for tapping-off
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J2203/00—Aspects of optical multiplex systems other than those covered by H04J14/05 and H04J14/07
    • H04J2203/0001—Provisions for broadband connections in integrated services digital network using frames of the Optical Transport Network [OTN] or using synchronous transfer mode [STM], e.g. SONET, SDH
    • H04J2203/0057—Operations, administration and maintenance [OAM]
    • H04J2203/006—Fault tolerance and recovery

Definitions

  • the system is one which operates on the synchronous digital hierarchy (S.D.H.) and
  • AdMux add drop multiplexer
  • the multiplex controller being arranged to switch signals from
  • the switching between cards may be done automatically under the control of the multiplex controller or altematively it may be hand controlled. In the latter case it will be controlled via a suitable management interface of the network.
  • the arrangement is preferably such that when the faulty tributary card has been replaced, the controller will switch out the protection card and revert to the use of the tributary card.
  • switching is preferably
  • switch unit protection mechanism or to prevent an indication of switch unit failure in the case of an unprotected switch unit, the maximum duration of any disruption of traffic from the output of the switch unit, due to switching between tributary cards, will be within the
  • the figure shows the tributary cards “1” to “n” and a protection card “10".
  • Each of the tributary cards is connected to a line termination unit (LTU) respectively "11", "12”,
  • the protection card "10” is connected to its own LTU "20".
  • Each of the LTU's is connected to a multiplex controller "21”, as shown, and each of the LTU's, apart from the
  • LTU 20 has a switching mechanism which is connected to a protection bus "23" so that the
  • LTU "20" can be switched through to one of the other appropriate LTU's. Each of the units also has an output port.
  • any plesiochronous digital hierarchical signal (P.D.H.) received on an LTU can be routed either directly to the card associated with the LTU or to the protection bus "23". All switching is under the control of the controller "21" and operation of the switch automatically disconnects the rest of the protection bus to the left of the card being protected, as viewed in fig. 1.
  • the related protection termination unit is inserted. This unit connects the protection

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
EP95911448A 1994-03-23 1995-03-21 Ersatzschalung für sdh einfüge/ausfüge multiplexer Withdrawn EP0752178A1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9405771 1994-03-23
GB9405771A GB9405771D0 (en) 1994-03-23 1994-03-23 Telecommunications system protection scheme
PCT/GB1995/000618 WO1995026084A1 (en) 1994-03-23 1995-03-21 Protection scheme for sdh add/drop multiplexer

Publications (1)

Publication Number Publication Date
EP0752178A1 true EP0752178A1 (de) 1997-01-08

Family

ID=10752383

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95911448A Withdrawn EP0752178A1 (de) 1994-03-23 1995-03-21 Ersatzschalung für sdh einfüge/ausfüge multiplexer

Country Status (7)

Country Link
EP (1) EP0752178A1 (de)
JP (1) JPH09510589A (de)
CN (1) CN1146836A (de)
AU (1) AU689557B2 (de)
GB (2) GB9405771D0 (de)
WO (1) WO1995026084A1 (de)
ZA (1) ZA952347B (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE504521C2 (sv) * 1995-06-01 1997-02-24 Ericsson Telefon Ab L M Multiplexor, skyddskopplingsenhet, telekommunikationsnät samt förfarande vid multiplexering
SE504533C2 (sv) * 1995-06-01 1997-03-03 Ericsson Telefon Ab L M Demultiplexor, skyddsomkopplingsenhet, telekommunikationsnät samt förfarande vid demultiplexering
GB2394849A (en) * 1999-10-01 2004-05-05 Agilent Technologies Inc Multi-channel replicating device for broadband optical signals, and systems including such devices
US6925052B1 (en) 1999-10-01 2005-08-02 Agilent Technologies, Inc. Multi-channel network monitoring apparatus, signal replicating device, and systems including such apparatus and devices, and enclosure for multi-processor equipment
CN101136711B (zh) * 2007-09-29 2011-11-23 中兴通讯股份有限公司 Sdh系统中光口业务、时钟、交叉业务高集成单板业务平滑切换系统

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2266644A (en) * 1992-04-25 1993-11-03 Plessey Telecomm Overhead transmissions in a data communication system
GB9311106D0 (en) * 1993-05-28 1993-07-14 Plessey Telecomm Switch plane maintenance

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9526084A1 *

Also Published As

Publication number Publication date
AU689557B2 (en) 1998-04-02
AU1901995A (en) 1995-10-09
GB9505559D0 (en) 1995-05-03
CN1146836A (zh) 1997-04-02
ZA952347B (en) 1995-12-15
JPH09510589A (ja) 1997-10-21
WO1995026084A1 (en) 1995-09-28
GB2290432A (en) 1995-12-20
GB9405771D0 (en) 1994-05-11
GB2290432B (en) 1998-06-10

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Legal Events

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