WO2002039632A1 - Terminal multiplexer structure - Google Patents

Terminal multiplexer structure Download PDF

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Publication number
WO2002039632A1
WO2002039632A1 PCT/AU2001/001359 AU0101359W WO0239632A1 WO 2002039632 A1 WO2002039632 A1 WO 2002039632A1 AU 0101359 W AU0101359 W AU 0101359W WO 0239632 A1 WO0239632 A1 WO 0239632A1
Authority
WO
WIPO (PCT)
Prior art keywords
interface cards
trunk
line interface
cards
trunk interface
Prior art date
Application number
PCT/AU2001/001359
Other languages
French (fr)
Inventor
Ross Halgren
Malcolm Cox
Original Assignee
Redfern Broadband Networks Pty Ltd
Redfern Broadband Networks, Inc.
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 Redfern Broadband Networks Pty Ltd, Redfern Broadband Networks, Inc. filed Critical Redfern Broadband Networks Pty Ltd
Priority to AU2002211989A priority Critical patent/AU2002211989A1/en
Publication of WO2002039632A1 publication Critical patent/WO2002039632A1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/02—Constructional details
    • H04Q1/10—Exchange station construction
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0287—Protection in WDM systems
    • H04J14/0289—Optical multiplex section protection
    • H04J14/0291—Shared protection at the optical multiplex section (1:1, n:m)
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/08—Indicating faults in circuits or apparatus
    • H04M3/12—Marking faulty circuits "busy"; Enabling equipment to disengage itself from faulty circuits ; Using redundant circuits; Response of a circuit, apparatus or system to an error
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0201—Add-and-drop multiplexing
    • H04J14/0202—Arrangements therefor
    • H04J14/021—Reconfigurable arrangements, e.g. reconfigurable optical add/drop multiplexers [ROADM] or tunable optical add/drop multiplexers [TOADM]
    • H04J14/0212—Reconfigurable arrangements, e.g. reconfigurable optical add/drop multiplexers [ROADM] or tunable optical add/drop multiplexers [TOADM] using optical switches or wavelength selective switches [WSS]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0287—Protection in WDM systems
    • H04J14/0297—Optical equipment protection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/005—Interface circuits for subscriber lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M7/00—Arrangements for interconnection between switching centres
    • H04M7/0096—Trunk circuits

Definitions

  • the present invention relates to a terminal multiplexer structure for use in a network node system.
  • the present invention seeks to provide a multiplexer structure which addresses this problem.
  • a terminal multiplexer structure comprising a plurality of line interface cards and a plurality of trunk interface cards, wherein each of the line interface cards is connected to at least two of the trunk interface cards and comprises switching means for switching between the two trunk interface cards.
  • channel protection can be effected without the requirement for a separate switch rack disposed between the line interface cards and the trunk interface cards.
  • the line interface cards and the trunk interface cards are configured as printed circuit boards capable of being inserted into slots of a rack of the multiplexer structure, and the connections between the line interface cards and the trunk interface cards are effected by way of backplane interconnects disposed on the backplane of the rack.
  • the switching means comprises an electronic switch.
  • the line interface and the trunk interface cards are disposed in a manner such that each line interface card is connected to two adjacent trunk interface cards on either side of the line interface card, wherein each trunk interface card has a further trunk interface card on its other side.
  • a terminal multiplexer structure comprising a plurality of line interface cards and a plurality of trunk interface cards, wherein each of the trunk interface cards is connected to at least two of the line interface cards and comprises switching means for switching between the two line interface cards.
  • line protection can be effected without the requirement for a separate switch rack disposed between the line interface cards and the trunk interface cards.
  • the line interface cards and the trunk interface cards are configured as printed circuit boards capable of being inserted into slots of a rack of the multiplexer structure, and the connections between the line interface cards and the trunk interface cards are effected by way of backplane interconnects disposed on the backplane of the rack.
  • the line interface cards and the trunk interface cards are disposed in a manner such that each trunk interface card is connected to two adjacent line interface cards on either side of the trunk interface, wherein each line interface card has a further line interface card on its other side.
  • the switching means comprises an electronic switch.
  • a terminal multiplexer structure comprising a plurality of line interface cards and a plurality of trunk interface cards, wherein at least one of the line interface cards is connected to at least two of the trunk interface cards and comprises switching means for switching between the two trunk interface cards, and wherein at least one of the trunk interface cards is connected to at least two of the line interface cards and comprises switching means for switching between the two line interface cards.
  • the line interface cards and the trunk interface cards are configured as printed circuit boards capable of being inserted into slots of a rack of the multiplexer structure, and the connections between the line interface cards and the trunk interface cards are effected by way of backplane interconnects disposed on the backplane of the rack.
  • the switching means comprises an electronic switch.
  • a line interface card adapted, in use, to be connected to at least two trunk interface cards, the line interface card including switching means for switching the connection between the two trunk interface cards.
  • a trunk interface card adapted, in use, to be connected to at least two line interface cards, the trunk interface card including switching means for switching the connection between the two line interface cards.
  • FIG. 1 is a schematic diagram showing interface cards embodying the present invention.
  • Figure 2 is a schematic diagram illustrating a multiplexer structure embodying the present invention.
  • Figure 3 is a schematic diagram illustrating a multiplexer structure embodying the present invention.
  • a line interface card 12 is located between two trunk interface cards 10, 14.
  • Each of the cards 10, 12, 14 comprises an on-card electronic cross connect switch 16.
  • the cross connect switches 16 are configured in a manner such that the respective interface cards can be selectively connected to either one of its neighbouring interface cards.
  • the centre line interface card 12 can be selectively connected either to the trunk interface card 10 or to the trunk interface card 14, by way of the cross connect switch 16 located on the line interface card 12.
  • Each cross connect switch 16 is controlled by an on-board controller 17 of the line or trunk interface cards 10, 12, 14, via an internal control channel 18.
  • the controller 17 is itself controlled via signals received on serial connections ports 19, 19a, from two redundant communications controller cards (not shown) for fault tolerance.
  • the on-card cross connect switch 16 thus enables a 1:1 protection against failure of one of the channels to which the respective trunk interface cards 10, 14 are connected.
  • the cross connect switch 16 on the line interface card 12 will re-direct its front interface transceiver connectivity to the trunk interface card 10.
  • the cross connect switches 16 can alternatively be used to connect the respective cards 10, 12, 14 to two redundant external switch cards of a switch rack (not shown) via switch ports 21, 21a, should such a switch rack be provided.
  • interconnection between the cards 10, 12, 14 can be effected through backplane connections disposed on the backplane of a rack into which the cards 10, 12, 14 are, in use, inserted.
  • a trunk card 30 can be protected against failure of an associated line interface card by providing connectivity to two line interface cards 32, 34, wherein the trunk card 30 comprises a cross connect switch 36 to selectively connect the trunk card 30 to either of the line interface cards 32, 34 (see figure 2).
  • a multiplexer structure 20 comprises two sets of alternately arranged front interface cards eg 22 and line interface cards eg 24.
  • the multiplexer structure 20 can provide 1 : 1 protection switching without the need for a separate switch sub-rack.

Abstract

A terminal multiplexer structure comprising a plurality of line interface cards (12) and a plurality of trunk interface cards (10, 14) wherein each of the line interface cards (12) is connected to at least two of the trunk interface cards (10, 14) and includes switching means (16) for switching the connection transmission from the line interface card (12) between the two trunk interface cards (10, 14).

Description

Terminal multiplexer structure
Field of the invention
The present invention relates to a terminal multiplexer structure for use in a network node system.
Background of the invention
There is a need for providing a flexible dense wavelength division multiplexing (DWDM) and switching architecture, eg for use in network node systems.
Traditional architectures centre around a fixed link between line interfaces and trunk interfaces to channels of the DWDM. Such architectures have the disadvantage that failure of one of the DWDM channels will effectively cut out one of the line connections, ie service to a particular subscriber is disrupted until the faulty DWDM channel has been "repaired", eg by replacing a DWDM laser.
The present invention seeks to provide a multiplexer structure which addresses this problem.
Summary of the invention
In accordance with a first aspect of the present invention there is provided a terminal multiplexer structure comprising a plurality of line interface cards and a plurality of trunk interface cards, wherein each of the line interface cards is connected to at least two of the trunk interface cards and comprises switching means for switching between the two trunk interface cards.
Accordingly, channel protection can be effected without the requirement for a separate switch rack disposed between the line interface cards and the trunk interface cards.
Preferably, the line interface cards and the trunk interface cards are configured as printed circuit boards capable of being inserted into slots of a rack of the multiplexer structure, and the connections between the line interface cards and the trunk interface cards are effected by way of backplane interconnects disposed on the backplane of the rack.
In one embodiment, the switching means comprises an electronic switch. Advantageously, the line interface and the trunk interface cards are disposed in a manner such that each line interface card is connected to two adjacent trunk interface cards on either side of the line interface card, wherein each trunk interface card has a further trunk interface card on its other side.
In accordance with a second aspect of the present invention there is provided a terminal multiplexer structure comprising a plurality of line interface cards and a plurality of trunk interface cards, wherein each of the trunk interface cards is connected to at least two of the line interface cards and comprises switching means for switching between the two line interface cards.
Accordingly, line protection can be effected without the requirement for a separate switch rack disposed between the line interface cards and the trunk interface cards.
Preferably, the line interface cards and the trunk interface cards are configured as printed circuit boards capable of being inserted into slots of a rack of the multiplexer structure, and the connections between the line interface cards and the trunk interface cards are effected by way of backplane interconnects disposed on the backplane of the rack.
Advantageously, the line interface cards and the trunk interface cards are disposed in a manner such that each trunk interface card is connected to two adjacent line interface cards on either side of the trunk interface, wherein each line interface card has a further line interface card on its other side.
In one embodiment, the switching means comprises an electronic switch.
In accordance with a third aspect of the present invention there is provided a terminal multiplexer structure comprising a plurality of line interface cards and a plurality of trunk interface cards, wherein at least one of the line interface cards is connected to at least two of the trunk interface cards and comprises switching means for switching between the two trunk interface cards, and wherein at least one of the trunk interface cards is connected to at least two of the line interface cards and comprises switching means for switching between the two line interface cards.
Preferably, the line interface cards and the trunk interface cards are configured as printed circuit boards capable of being inserted into slots of a rack of the multiplexer structure, and the connections between the line interface cards and the trunk interface cards are effected by way of backplane interconnects disposed on the backplane of the rack.
In one embodiment, the switching means comprises an electronic switch.
In accordance with a fourth aspect of the present invention, there is provided a line interface card adapted, in use, to be connected to at least two trunk interface cards, the line interface card including switching means for switching the connection between the two trunk interface cards.
In accordance with a fifth aspect of the present invention, there is provided a trunk interface card adapted, in use, to be connected to at least two line interface cards, the trunk interface card including switching means for switching the connection between the two line interface cards.
Preferred forms of the present invention will now be described, by way of example only, with reference to the accompanying drawings.
Brief description of the drawings
Figure 1 is a schematic diagram showing interface cards embodying the present invention.
Figure 2 is a schematic diagram illustrating a multiplexer structure embodying the present invention.
Figure 3 is a schematic diagram illustrating a multiplexer structure embodying the present invention.
Detailed description of the embodiments
In Figure 1, a line interface card 12 is located between two trunk interface cards 10, 14.
Each of the cards 10, 12, 14 comprises an on-card electronic cross connect switch 16. The cross connect switches 16 are configured in a manner such that the respective interface cards can be selectively connected to either one of its neighbouring interface cards.
More particularly, in Figure 1 the centre line interface card 12 can be selectively connected either to the trunk interface card 10 or to the trunk interface card 14, by way of the cross connect switch 16 located on the line interface card 12. Each cross connect switch 16 is controlled by an on-board controller 17 of the line or trunk interface cards 10, 12, 14, via an internal control channel 18. The controller 17 is itself controlled via signals received on serial connections ports 19, 19a, from two redundant communications controller cards (not shown) for fault tolerance.
In use, the on-card cross connect switch 16 thus enables a 1:1 protection against failure of one of the channels to which the respective trunk interface cards 10, 14 are connected. In other words, should eg the DWDM laser of the DWDM channel to which the trunk interface card 14 is connected fail, the cross connect switch 16 on the line interface card 12 will re-direct its front interface transceiver connectivity to the trunk interface card 10.
As shown in Figure 1, the cross connect switches 16 can alternatively be used to connect the respective cards 10, 12, 14 to two redundant external switch cards of a switch rack (not shown) via switch ports 21, 21a, should such a switch rack be provided.
It is noted that the interconnection between the cards 10, 12, 14 can be effected through backplane connections disposed on the backplane of a rack into which the cards 10, 12, 14 are, in use, inserted.
It will be appreciated by a person skilled in the art that similarly a trunk card 30 can be protected against failure of an associated line interface card by providing connectivity to two line interface cards 32, 34, wherein the trunk card 30 comprises a cross connect switch 36 to selectively connect the trunk card 30 to either of the line interface cards 32, 34 (see figure 2).
Turning now to figure 3, a multiplexer structure 20 comprises two sets of alternately arranged front interface cards eg 22 and line interface cards eg 24. The multiplexer structure 20 can provide 1 : 1 protection switching without the need for a separate switch sub-rack.
It will be appreciated by a person skilled in the art that numerous variations and/or modifications may be made to the present invention as shown in the specific embodiments without departing from the spirit or scope of the invention as broadly described. The present embodiments are, therefore, to be considered in all respects to be illustrative and not restrictive.
In the claims that follow and in the summary of the invention, except where the context requires otherwise due to express language or necessary implication, the word "comprising" is used in the sense of "including", ie features specified may be associated with further features in various embodiments of the invention.

Claims

Claims
1 A terminal multiplexer structure comprising:
- a plurality of line interface cards and
- a plurality of trunk interface cards, wherein each of the line interface cards is connected to at least two of the trunk interface cards and includes switching means for switching the connection between the two trunk interface cards.
2 A multiplexer structure as claimed in claim 1, wherein the line interface cards and the trunk interface cards are configured as printed circuit boards capable of being inserted into slots of a rack of the multiplexer structure, and the connections between the line interface cards and the trunk interface cards are effected by way of backplane interconnects disposed on the backplane of the rack.
3 A multiplexer structure as claimed in claims 1 or 2, wherein the line interface and the trunk interface cards are disposed in a manner such that each line interface card is connected to two adjacent trunk interface cards on either side of the line interface card.
4 A multiplexer structure as claimed in claim 3, wherein each trunk interface card has a further trunk interface card on its other side.
5 A multiplexer structure as claimed in any one of the proceeding claims, wherein the switching means comprises an electronic switch.
6 A terminal multiplexer structure comprising:
- a plurality of line interface cards and
- a plurality of trunk interface cards, wherein each of the trunk interface cards is connected to at least two of the line interface cards and including switching means for switching the connection between the two line interface cards.
7 A multiplexer structure as claimed in claim 6, wherein the line interface cards and the trunk interface cards are configured as printed circuit boards capable of being inserted into slots of a rack of the multiplexer structure, and the connections between the line interface cards and the trunk interface cards are effected by way of backplane interconnects disposed on the backplane of the rack.
8 A multiplexer structure as claimed in claims 6 or 7, wherein the line interface and the trunk interface cards are disposed in a manner such that each trunk interface card is connected to two adjacent line interface cards on either side of the trunk interface card.
9 A multiplexer structure as claimed in claim 8, wherein each line interface card has a further line interface card on its other side.
10 A multiplexer structure as claimed in any one of claims 6-9, wherein the switching means comprises an electronic switch.
11 A terminal multiplexer structure comprising:
- a plurality of line interface cards and
- a plurality of trunk interface cards, wherein at least one of the line interface cards is connected to at least two of the trunk interface cards and comprises switching means for switching between the two trunk interface cards, and wherein at least one of the trunk interface cards is connected to at least two of the line interface cards and comprises switching means for switching between the two line interface cards.
12 A line interface card adapted, in use, to be connected to at least two trunk interface cards, the line interface card including switching means for switching the connection between the two trunk interface cards.
13 A trunk interface card adapted, in use, to be connected to at least two line interface cards, the trunk interface card including switching means for switching the connection between the two line interface cards.
PCT/AU2001/001359 2000-11-10 2001-10-23 Terminal multiplexer structure WO2002039632A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002211989A AU2002211989A1 (en) 2000-11-10 2001-10-23 Terminal multiplexer structure

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/710,722 2000-11-10
US09/710,722 US6965561B1 (en) 2000-11-10 2000-11-10 Terminal multiplexer structure

Publications (1)

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WO2002039632A1 true WO2002039632A1 (en) 2002-05-16

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PCT/AU2001/001359 WO2002039632A1 (en) 2000-11-10 2001-10-23 Terminal multiplexer structure

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US (1) US6965561B1 (en)
EP (1) EP1206142A1 (en)
CN (1) CN1475059A (en)
AU (1) AU2002211989A1 (en)
HK (1) HK1046801A1 (en)
WO (1) WO2002039632A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2534673C (en) * 2003-08-07 2014-01-28 Pirelli & C. S.P.A. A modular, easily configurable and expandible node structure for an optical communications network

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4987591A (en) * 1988-06-06 1991-01-22 Kabushiki Kaisha Toshiba Electronic telephone apparatus able to supply sync clock signals reliably, and method of controlling the supply of sync clock signals
US5027344A (en) * 1989-06-28 1991-06-25 Data General Corporation Integrated office controller (IOC)
AU6486594A (en) * 1993-06-21 1994-12-22 Rpx Corporation Communication system with ISDN as a backup of inter-PBX tie trunk
JPH07245792A (en) * 1994-03-03 1995-09-19 Hitachi Telecom Technol Ltd Allocation system for highway and time slot
JP2000175230A (en) * 1998-12-04 2000-06-23 Hitachi Telecom Technol Ltd Control method for remote switch in exchange

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4893301A (en) * 1988-06-27 1990-01-09 Teknekron Infoswitch Corporation Automatic call distribution (ACD) switching system having distributed processing capability
JPH0964883A (en) * 1995-08-24 1997-03-07 Toshiba Corp Multiplexed terminal station equipment
US6072794A (en) * 1997-04-24 2000-06-06 Daewoo Telecom Co., Ltd. Digital trunk interface unit for use in remote access system
CN1269946A (en) 1997-09-05 2000-10-11 摩托罗拉公司 Insert/delete modification of information service message
NL1006963C2 (en) * 1997-09-08 1999-03-09 Koninkl Kpn Nv Interconnection system for optical networks.
US6147988A (en) * 1997-10-27 2000-11-14 Bell Atlantic Network Services, Inc. IP packet switching in a Telco switch
US6061363A (en) * 1997-12-01 2000-05-09 Nortel Networks Corporation Communications system with load sharing communications interface
GB2346280A (en) 1998-10-22 2000-08-02 Hewlett Packard Co Optical switching interface using transponders
US6657951B1 (en) * 1998-11-30 2003-12-02 Cisco Technology, Inc. Backup CRF VLAN
IT1312225B1 (en) 1999-03-23 2002-04-09 Cit Alcatel OPTOELECTRIC NETWORK ELEMENT OPTIMIZED FOR CONVEYOR NETWORKS.
US6550016B1 (en) * 1999-06-08 2003-04-15 Cisco Technology, Inc. Protection bus and method for a telecommunications device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4987591A (en) * 1988-06-06 1991-01-22 Kabushiki Kaisha Toshiba Electronic telephone apparatus able to supply sync clock signals reliably, and method of controlling the supply of sync clock signals
US5027344A (en) * 1989-06-28 1991-06-25 Data General Corporation Integrated office controller (IOC)
AU6486594A (en) * 1993-06-21 1994-12-22 Rpx Corporation Communication system with ISDN as a backup of inter-PBX tie trunk
JPH07245792A (en) * 1994-03-03 1995-09-19 Hitachi Telecom Technol Ltd Allocation system for highway and time slot
JP2000175230A (en) * 1998-12-04 2000-06-23 Hitachi Telecom Technol Ltd Control method for remote switch in exchange

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Derwent World Patents Index; Class W01, AN 1995-357152/46 *
DATABASE WPI Derwent World Patents Index; Class W01, AN 2000-471021/41 *

Also Published As

Publication number Publication date
US6965561B1 (en) 2005-11-15
HK1046801A1 (en) 2003-01-24
AU2002211989A1 (en) 2002-05-21
CN1475059A (en) 2004-02-11
EP1206142A1 (en) 2002-05-15

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