WO2015117935A1 - Fiber optic cabinet and network system with back-up connectivity - Google Patents

Fiber optic cabinet and network system with back-up connectivity Download PDF

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Publication number
WO2015117935A1
WO2015117935A1 PCT/EP2015/052137 EP2015052137W WO2015117935A1 WO 2015117935 A1 WO2015117935 A1 WO 2015117935A1 EP 2015052137 W EP2015052137 W EP 2015052137W WO 2015117935 A1 WO2015117935 A1 WO 2015117935A1
Authority
WO
WIPO (PCT)
Prior art keywords
cabinets
cables
sub
network
fiber optic
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.)
Ceased
Application number
PCT/EP2015/052137
Other languages
French (fr)
Inventor
Kristof Vastmans
Johan Geens
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.)
Commscope Connectivity Belgium BVBA
Original Assignee
Tyco Electronics Raychem BVBA
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 Tyco Electronics Raychem BVBA filed Critical Tyco Electronics Raychem BVBA
Priority to US15/116,700 priority Critical patent/US9985723B2/en
Publication of WO2015117935A1 publication Critical patent/WO2015117935A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24Coupling light guides
    • G02B6/26Optical coupling means
    • G02B6/35Optical coupling means having switching means
    • G02B6/354Switching arrangements, i.e. number of input/output ports and interconnection types
    • G02B6/3562Switch of the bypass type, i.e. enabling a change of path in a network, e.g. to bypass a failed element in the network
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4439Auxiliary devices
    • G02B6/444Systems or boxes with surplus lengths
    • G02B6/4452Distribution frames
    • G02B6/44524Distribution frames with frame parts or auxiliary devices mounted on the frame and collectively not covering a whole width of the frame or rack
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4439Auxiliary devices
    • G02B6/444Systems or boxes with surplus lengths
    • G02B6/44528Patch-cords; Connector arrangements in the system or in the box
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B10/00Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/03Arrangements for fault recovery
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B10/00Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/25Arrangements specific to fibre transmission
    • H04B10/2589Bidirectional transmission
    • H04B10/25891Transmission components
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B10/00Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/27Arrangements for networking
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q11/00Selecting arrangements for multiplex systems
    • H04Q11/0001Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0005Switch and router aspects
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q11/00Selecting arrangements for multiplex systems
    • H04Q11/0001Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062Network aspects
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q11/00Selecting arrangements for multiplex systems
    • H04Q11/0001Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0005Switch and router aspects
    • H04Q2011/0037Operation
    • H04Q2011/0043Fault tolerance
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q11/00Selecting arrangements for multiplex systems
    • H04Q11/0001Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062Network aspects
    • H04Q2011/0079Operation or maintenance aspects
    • H04Q2011/0081Fault tolerance; Redundancy; Recovery; Reconfigurability

Definitions

  • the present invention concerns fiber optic networks. There is a continuing need to provide service in the event of a failure of a service providing center, such as a central office.
  • One aspect of the present invention relates to a fiber optic network including a central office or a mobile switching center which provides service to remote cabinets via cabling.
  • the remote cabinets are connected to homes, businesses, or other premises with various cables.
  • a mobile central office or mobile switching center in the form of a vehicle can be used to deploy new service through one of the remote cabinets which provides service to the premises served by that cabinet, and to other cabinets in the network.
  • equipment is provided in each of the cabinets to receive service from a secondary source through cabling, and provide that secondary source through cabling to the premises served by that cabinet, or to provide service to other cabinets, thereby maintaining service in the network.
  • the mobile switching center in the form of a vehicle can be utilized while the central office or mobile switching center is repaired.
  • FIG. 1 is a schematic representation of a fiber optic network in accordance with the present invention.
  • FIGS. 2 through 6 show in enlarged views different portions of the network of FIG. 1;
  • FIG. 7 is a front view of an example cabinet
  • FIG. 8 is a side view of the cabinet of FIG. 7;
  • FIG. 9 is a perspective view of the cabinet of FIG. 7, showing various doors in the open position to access an interior of the cabinet;
  • FIG. 10 is a front view of the cabinet showing the cabinet populated with various equipment including an exteriorly accessible patch panel;
  • FIG. 11 is a side view of the cabinet of FIG. 10 showing the exteriorly accessible patch panel
  • FIG. 12 is a perspective view showing further details of a patch panel on a side of a cabinet, in one example embodiment.
  • Various fiber optic networks include a central office which serves remote customers via fiber optic cables.
  • the cables from the central office are linked to remote equipment which further distributes the fiber optic service to the remote customers.
  • Hubs or cabinets can be used to connect customers to the central office.
  • the central office can become disabled or fail due to a catastrophic event. In such a situation, a back up system is provided to continue service to the customers connected to the central office.
  • the central office may also be referred to as a mobile switching center.
  • a fiber optic network 10 includes a Mobile Switching Center (MSC) 12 which distributes fiber optic signals to one or more remote cabinets 40, 42, 44.
  • the remote cabinets 40, 42, 44 distribute signals to one or more manholes 60, 62, 64.
  • Manholes 60, 62, 64 include a terminal for receiving feeder cables and distribution cables 144.
  • the manholes 60, 62, 64 serve individual premises such as businesses or homes 80, 82, 84.
  • Network 10 shows three example remote cabinets 40, 42, 44, three manholes 60, 62, 64, and three businesses or homes 80, 82, 84.
  • Network 10 can include more cabinets, manholes, and businesses or homes as desired.
  • Feeder cables 100 feed signals from MSC 12 to each of cabinets 40, 42, 44.
  • Distribution cables 120 extend from cabinets 40, 42, 44 to serve manholes 60, 62, 64.
  • sub-racks 150, 152 Disposed within each of cabinets 40, 42, 44 are sub-racks 150, 152 which are connected by patch cables 130 thereby connecting the feeder cables 100 to the distribution cables 120.
  • a back-up network is provided.
  • MSC 12 may be damaged due to a fire, an explosion or other catastrophic event that prevents MSC 12 from providing and receiving signals.
  • a vehicle such as a truck, can provide temporary service to network 10.
  • Access for the feeder cables into network 10 is through a patch panel 200 located one of cabinets 40, 42, 44.
  • patch panel 200 is shown on cabinet 40.
  • Patch panel 200 connects to sub-racks 154 which deliver signals to sub-racks 152 with patch cables 138 in order to serve manholes 60 connected to cabinet 40.
  • Sub- racks 154 also deliver signals to sub-racks 156 in cabinet 40 with patch cables 132.
  • Sub- racks 156 are connected by cables 134, 134 to cabinets 42, 44 to provide feeder signals to these cabinets.
  • Sub-racks 158 in cabinets 42, 44 receive feeder signals from cabinet 40.
  • Patch cables 138, 140 connect sub-racks 158 to sub-racks 152 for delivery of signals to their respective manholes 62, 64 connected to cabinets 42, 44.
  • the MSC 12 can be repaired, while signals can be delivered to the customers by accessing a feeder input at cabinet 40 at patch panel 200.
  • Patch panel 200 can be an external patch panel which uses hardened fiber optic cables which have improved resistance to water, dust, and other environmental conditions. By using an external patch panel 200, access to an interior of cabinet 40 is not needed except for routing of the internal patch cords, as needed.
  • multi- fiber hardened connectors are used. See an example OPTI-TIP hardened connector by Corning and U.S. Patent No. 7,264,402. Within sub-racks 154, the multi-fiber cables 300 are fanned out into individual fibers at cassettes 400.
  • Back-up cables 140, 142 can be provided should cables 134, 136 fail.
  • Back-up sub-racks 170, 172 connect to back-up cables 140, 142.
  • Each of the cabinets includes an enclosure 600. Doors 602, 604, 606 are used to access an interior 620 of each cabinet. Interior 620 is where the various equipment for connecting the customers to the MSC 12 are housed. The interior 620 is also the location of the various patch cables which connect the different pieces of equipment to enable connection from the MSC 12 to the customers, or the vehicle 500 to the customers.
  • patch cords are used within each cabinet 40, 42, 44 to connect the sub-racks 154, 156, 158 to the various customers.
  • the various patch cables used during back-up service can be the same ones used under normal service from the MSC 12, or they can be different, especially if different lengths are needed.
  • the various sub-racks 150, 152, 154, 156, 158, 170, 172 can include telecommunications equipment for connecting fiber optic cables.
  • the sub-racks can contain splices.
  • fan-outs can be provided for accepting a multi- fiber feeder cable and splitting the cable into individual single fiber cables.
  • a multi- fiber to single fiber cassette 400 in sub-rack 154 can be provided.
  • An appropriate number of cassettes 400 are utilized depending on how many input and output cables are desired.
  • the various cables 100, 120, 134, 136, 140, 142 can be multi-fiber cables, as desired.
  • not all of the customers connected to the MSC 12 are connected during the back-up service provided by vehicle 500.
  • all of the customers can be connected if desired through the back-up service.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Electromagnetism (AREA)
  • Signal Processing (AREA)
  • Computing Systems (AREA)
  • Structure Of Telephone Exchanges (AREA)
  • Small-Scale Networks (AREA)

Abstract

A fiber optic network (10) includes a mobile switching center (MSC) (12) which distributes fiber optic signals to one or more remote cabinets (40, 42, 44). The remote cabinets (40, 42, 44) distribute signals to one or more customers. The cabinets (40, 42, 44) receive service from the MSC (12) or from a temporary service provider, such as a vehicle (500), in the event of a catastrophic failure of the MSC (12).The cabinets (40, 42, 44) include equipment which allows patching to a temporary service provider through a patch panel (200), and sub-racks (154, 156, 158) and supporting cabling (134, 136) to provide service to each of the cabinets in the network.

Description

FIBER OPTIC CABINET AND NETWORK SYSTEM WITH BACK-UP
CONECTIVITY
Cross-Reference to Related Application's)
This application claims priority to U.S. Patent Application Serial No. 61/935,692 filed on February 4, 2014, the disclosure of which is incorporated herein by reference in its entirety.
Background
The present invention concerns fiber optic networks. There is a continuing need to provide service in the event of a failure of a service providing center, such as a central office.
Summary
One aspect of the present invention relates to a fiber optic network including a central office or a mobile switching center which provides service to remote cabinets via cabling. The remote cabinets are connected to homes, businesses, or other premises with various cables. In the event the central office incurs a failure, a mobile central office or mobile switching center in the form of a vehicle can be used to deploy new service through one of the remote cabinets which provides service to the premises served by that cabinet, and to other cabinets in the network.
In one aspect of the invention, equipment is provided in each of the cabinets to receive service from a secondary source through cabling, and provide that secondary source through cabling to the premises served by that cabinet, or to provide service to other cabinets, thereby maintaining service in the network. The mobile switching center in the form of a vehicle can be utilized while the central office or mobile switching center is repaired.
Brief Description of the Drawings
FIG. 1 is a schematic representation of a fiber optic network in accordance with the present invention.
FIGS. 2 through 6 show in enlarged views different portions of the network of FIG. 1;
FIG. 7 is a front view of an example cabinet; FIG. 8 is a side view of the cabinet of FIG. 7;
FIG. 9 is a perspective view of the cabinet of FIG. 7, showing various doors in the open position to access an interior of the cabinet;
FIG. 10 is a front view of the cabinet showing the cabinet populated with various equipment including an exteriorly accessible patch panel;
FIG. 11 is a side view of the cabinet of FIG. 10 showing the exteriorly accessible patch panel;
FIG. 12 is a perspective view showing further details of a patch panel on a side of a cabinet, in one example embodiment.
Detailed Description
Various fiber optic networks include a central office which serves remote customers via fiber optic cables. The cables from the central office are linked to remote equipment which further distributes the fiber optic service to the remote customers. Hubs or cabinets can be used to connect customers to the central office. In some situations, the central office can become disabled or fail due to a catastrophic event. In such a situation, a back up system is provided to continue service to the customers connected to the central office. In some situations, the central office may also be referred to as a mobile switching center.
Referring now to the figures, a fiber optic network 10 includes a Mobile Switching Center (MSC) 12 which distributes fiber optic signals to one or more remote cabinets 40, 42, 44. The remote cabinets 40, 42, 44 distribute signals to one or more manholes 60, 62, 64. Manholes 60, 62, 64 include a terminal for receiving feeder cables and distribution cables 144. The manholes 60, 62, 64 serve individual premises such as businesses or homes 80, 82, 84. Network 10 shows three example remote cabinets 40, 42, 44, three manholes 60, 62, 64, and three businesses or homes 80, 82, 84. Network 10 can include more cabinets, manholes, and businesses or homes as desired.
Feeder cables 100 feed signals from MSC 12 to each of cabinets 40, 42, 44. Distribution cables 120 extend from cabinets 40, 42, 44 to serve manholes 60, 62, 64.
Disposed within each of cabinets 40, 42, 44 are sub-racks 150, 152 which are connected by patch cables 130 thereby connecting the feeder cables 100 to the distribution cables 120.
Should a problem arise with signal delivery by the MSC 12, a back-up network is provided. For example, MSC 12 may be damaged due to a fire, an explosion or other catastrophic event that prevents MSC 12 from providing and receiving signals. In case of damage to MSC 12, a vehicle, such as a truck, can provide temporary service to network 10. Access for the feeder cables into network 10 is through a patch panel 200 located one of cabinets 40, 42, 44. In the example shown, patch panel 200 is shown on cabinet 40. Patch panel 200 connects to sub-racks 154 which deliver signals to sub-racks 152 with patch cables 138 in order to serve manholes 60 connected to cabinet 40. Sub- racks 154 also deliver signals to sub-racks 156 in cabinet 40 with patch cables 132. Sub- racks 156 are connected by cables 134, 134 to cabinets 42, 44 to provide feeder signals to these cabinets. Sub-racks 158 in cabinets 42, 44 receive feeder signals from cabinet 40. Patch cables 138, 140 connect sub-racks 158 to sub-racks 152 for delivery of signals to their respective manholes 62, 64 connected to cabinets 42, 44.
In this manner, the MSC 12 can be repaired, while signals can be delivered to the customers by accessing a feeder input at cabinet 40 at patch panel 200.
Patch panel 200 can be an external patch panel which uses hardened fiber optic cables which have improved resistance to water, dust, and other environmental conditions. By using an external patch panel 200, access to an interior of cabinet 40 is not needed except for routing of the internal patch cords, as needed. In one example, multi- fiber hardened connectors are used. See an example OPTI-TIP hardened connector by Corning and U.S. Patent No. 7,264,402. Within sub-racks 154, the multi-fiber cables 300 are fanned out into individual fibers at cassettes 400.
Back-up cables 140, 142 can be provided should cables 134, 136 fail.
Back-up sub-racks 170, 172 connect to back-up cables 140, 142.
Referring now to FIGS. 7 through 12, further examples of cabinets 40, 42, 44 are shown. Each of the cabinets includes an enclosure 600. Doors 602, 604, 606 are used to access an interior 620 of each cabinet. Interior 620 is where the various equipment for connecting the customers to the MSC 12 are housed. The interior 620 is also the location of the various patch cables which connect the different pieces of equipment to enable connection from the MSC 12 to the customers, or the vehicle 500 to the customers.
When back-up service is desired, such as due to a failure of the MSC 12, patch cords are used within each cabinet 40, 42, 44 to connect the sub-racks 154, 156, 158 to the various customers. It is to be appreciated that the various patch cables used during back-up service can be the same ones used under normal service from the MSC 12, or they can be different, especially if different lengths are needed. The various sub-racks 150, 152, 154, 156, 158, 170, 172 can include telecommunications equipment for connecting fiber optic cables. In one embodiment, the sub-racks can contain splices. In the case of sub-racks 154, fan-outs can be provided for accepting a multi- fiber feeder cable and splitting the cable into individual single fiber cables. In one example, a multi- fiber to single fiber cassette 400 in sub-rack 154 can be provided. An appropriate number of cassettes 400 are utilized depending on how many input and output cables are desired. The various cables 100, 120, 134, 136, 140, 142 can be multi-fiber cables, as desired.
In some situations, not all of the customers connected to the MSC 12 are connected during the back-up service provided by vehicle 500. There are situations in which only a certain percentage of the customers are connected to the back-up service. In such situations, priority may be given to certain customers or premises in which service is in high demand or for critical needs. This may reduce the number of patchings needed in each of cabinets 40, 42, 44 during the back-up service. However, it is to be appreciated that all of the customers can be connected if desired through the back-up service.
List of Reference Numerals and Corresponding Features
10 Fiber optic network
12 MSC
40 Cabinet
42 Cabinet
44 Cabinet
60 Manhole
62 Manhole
64 Manhole
80 Home
82 Home
84 Home
100 Feeder cables
120 Distribution cables
130 Patch cables
132 Patch cables
134 Cables
136 Cables
138 Patch cables
140 Back-up cables
142 Back-up cables
144 Drop cables
150 Sub-racks
152 Sub-racks
154 Sub-racks
156 Sub-racks
158 Sub-racks
170 Back-up sub-racks
172 Back-up sub-racks
200 External patch panel
300 Multi-fiber cables
400 Cassettes
500 Truck
600 Cabinet enclosure 602 Door
604 Door
606 Door
610 Side
620 Interior

Claims

What is claimed is:
1. A fiber optic network (10) comprising:
a plurality of cabinets (40, 42, 44);
an MSC (12) which distributes fiber optic signals to one or more remotely located cabinets (40, 42, 44), the cabinets providing service to individual premises, such as homes or businesses (80, 82, 84);
feeder cables (100) which deliver feeder cable signals to each of the cabinets (40, 42, 44);
distribution cables (120) extending from the cabinets (40, 42, 44) to the premises; sub-racks (150, 152) disposed within each of cabinets (40, 42, 44) which are connected with patch cables (130) thereby connecting the feeder cables (100) to the distribution cables (120) within each cabinet;
a back-up system, such as a vehicle, which can selectively provide feeder cable signals to network (10), including:
a patch panel (200) located in or on one of the cabinets (40, 42, 44) for access for the feeder cables into the network;
a sub-rack (154) which connects to patch panel (200) which delivers signals to sub- racks (152) with patch cables in order to serve premises connected to cabinet (40), wherein the sub-rack (154) also delivers signals to a sub-rack (156) in cabinet (40), wherein sub- rack (156) is connected with cables to other cabinets (42, 44) to provide feeder signals to these cabinets, wherein a sub-rack (158) in each of these other cabinets (42, 44) receives feeder signals from cabinet (40);
patch cables connecting sub-racks (158) to sub-racks (152) in the other cabinets (42, 44) for delivery of signals to their respective premises connected to cabinets (42, 44).
2. A fiber optic network (10) according to claim 1, comprising two cabinets.
3. A fiber optic network (10) according to claim 2, comprising three cabinets.
4. A fiber optic network (10) according to claim 1, wherein the patch panel uses hardened fiber optic connectors.
5. A fiber optic network (10) according to claim 4, wherein the connectors are multi- fiber connectors.
6. A method of using the network of claim 1 , wherein use of the back-up system is temporary until the MSC is operational.
7. The network and method of claims 1-6, wherein further back-up cables (140, 142) are provided for the back-up cables (134, 136).
8. The network and method of claims 1-7, wherein the patch cables (130) are the same patch cables as the patch cables connecting the sub-racks (154, 156, 158).
9. The network and method of claims 1-7, wherein the patch cables (130) are different patch cables as the patch cables connecting the sub-racks (154, 156, 158).
PCT/EP2015/052137 2014-02-04 2015-02-03 Fiber optic cabinet and network system with back-up connectivity Ceased WO2015117935A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US15/116,700 US9985723B2 (en) 2014-02-04 2015-02-03 Fiber optic cabinet and network system with back-up connectivity

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201461935692P 2014-02-04 2014-02-04
US61/935,692 2014-02-04

Publications (1)

Publication Number Publication Date
WO2015117935A1 true WO2015117935A1 (en) 2015-08-13

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WO (1) WO2015117935A1 (en)

Families Citing this family (4)

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US10310206B2 (en) * 2017-05-22 2019-06-04 Go!Foton Holdings, Inc. Apparatus for cable routing
JP7260713B2 (en) * 2020-03-23 2023-04-18 株式会社日立製作所 On-board control device
US12158613B2 (en) 2022-02-02 2024-12-03 Sanwa Technologies, Inc. Optical connector switches, systems, and methods
CN118033842B (en) * 2024-04-15 2024-06-07 北京邮电大学 Optical fiber exchange box for communication engineering

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