WO2009146022A2 - Dispositif antitraction pour fibre optique et armoire de distribution - Google Patents

Dispositif antitraction pour fibre optique et armoire de distribution Download PDF

Info

Publication number
WO2009146022A2
WO2009146022A2 PCT/US2009/038862 US2009038862W WO2009146022A2 WO 2009146022 A2 WO2009146022 A2 WO 2009146022A2 US 2009038862 W US2009038862 W US 2009038862W WO 2009146022 A2 WO2009146022 A2 WO 2009146022A2
Authority
WO
WIPO (PCT)
Prior art keywords
panel
cabinet
strain relief
optical fiber
drop cables
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/US2009/038862
Other languages
English (en)
Other versions
WO2009146022A3 (fr
Inventor
Shirley E. Ball
Victor J. Borer
Sidney J. Berglund
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.)
3M Innovative Properties Co
Original Assignee
3M Innovative Properties Co
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 3M Innovative Properties Co filed Critical 3M Innovative Properties Co
Publication of WO2009146022A2 publication Critical patent/WO2009146022A2/fr
Publication of WO2009146022A3 publication Critical patent/WO2009146022A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4439—Auxiliary devices
    • G02B6/444—Systems or boxes with surplus lengths
    • G02B6/4452—Distribution frames
    • G02B6/44524—Distribution frames with frame parts or auxiliary devices mounted on the frame and collectively not covering a whole width of the frame or rack

Definitions

  • the present invention generally relates to telecommunications systems. More particularly, the present invention relates to an optical fiber distribution cabinet for an optical fiber based network.
  • Telecommunication networks based on optical fiber cables are well known. As telecommunication cables are routed across networks, it is necessary to periodically open the cable and splice or tap into the cable so that data may be distributed to "branches" of the network. The branches may be further distributed until the network reaches individual homes, businesses, offices, and so on.
  • the distributed lines are often referred to as drop lines or distribution lines.
  • the network comprises a central office (CO) and/or a fiber distribution hub (FDH) that distributes thousands of communication lines out to the series of closures/terminals that house these branching points, such as at a fiber closure, a fiber terminal closure, a fiber terminal, and the like.
  • CO central office
  • FDH fiber distribution hub
  • a first aspect of the invention described herein provides a strain relief and grounding panel for a telecommunications enclosure that terminates a plurality of fiber optic drop cables.
  • the strain relief and grounding panel comprises at least one securing plate and an array of fastening mechanisms formed on the at least one securing plate.
  • the fastening mechanisms receive and secure the support wire portion of the plurality of drop cables.
  • the optical fiber distribution cabinet receives the plurality of drop cables directly from a high density neighborhood or multi-dwelling unit.
  • the array of fastening mechanisms comprises a plurality of lugs arranged in a plurality of rows and columns on the at least one support plate, where the spacing between each column forms a guide channel of sufficient width to guide a plurality of drop cables.
  • At least two securing plates are formed in a stacked arrangement on a support structure, where each securing plate is detachable (either partially or completely) from the support structure.
  • the support structure can be the cabinet itself or a separate structure.
  • each fastening mechanism can receive a plurality of support wires.
  • each securing plate can secure and ground at least 200 drop cables.
  • an optical fiber distribution cabinet comprises a splitter panel to receive a plurality of optical fibers from a central office of a telecommunication network, a distribution panel comprising a plurality of terminated drop cables, the distribution panel linked to the splitter panel via a series of jumpers, and the strain relief and grounding panel described above.
  • the optical fiber distribution cabinet includes front access doors, side walls, a rear wall, a top wall, and a base.
  • the optical fiber distribution cabinet is a passive device.
  • the cabinet is an outdoor cabinet.
  • the cabinet is mounted to one of a concrete pad and a telecommunications pole.
  • Fig. 1 is an isometric view of an optical fiber distribution cabinet according to an exemplary aspect of the present invention.
  • Fig. 2 is a close up isometric view of a strain relief and grounding panel of the cabinet according to an exemplary aspect of the present invention.
  • Fig. 3 is an isometric side view of the optical fiber distribution cabinet of Fig. 1.
  • Fig. 4 is a front view of the strain relief and grounding panel of Fig. 2.
  • Figs. 5A - 5C show cross section views of exemplary fiber optic drop cables.
  • Fig. 6 is a front view of an exemplary splitter unit.
  • Fig. 7 is a schematic view of an optical network that includes an optical fiber distribution cabinet according to an exemplary aspect of the present invention. While the invention is amenable to various modifications and alternative forms, specifics thereof have been shown by way of example in the drawings and will be described in detail. It should be understood, however, that the intention is not to limit the invention to the particular embodiments described. On the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the scope of the invention as defined by the appended claims.
  • the fiber distribution cabinet for an optical fiber based network is described herein.
  • the fiber distribution cabinet is operated outdoors as an above-ground, passive device that can accommodate several hundred fiber drops directly from a multi-dwelling unit (MDU) or high density neighborhood.
  • MDU multi-dwelling unit
  • the exemplary cabinet can provide grounding, routing, and strain relief for this high count of drop cables.
  • the fiber distribution cabinet herein is a terminal cabinet that can accommodate a large count of drop cable home runs. With this scheme, the need for additional and separate fiber closures and terminals is eliminated.
  • Figs. 1-6 show an exemplary fiber distribution cabinet 100 and components thereof according to a first aspect of the present invention.
  • cabinet 100 is a sturdy structure having a generally rectangular body 110, with one or more front access doors 112, side walls 114, a top 113, a rear wall 117 (see Fig. 3) and a base 116.
  • only a front access would be needed, such as is provided by doors 112 shown in Fig. 1.
  • side and/or rear access doors or panels can also be provided.
  • the body components can be constructed from any conventional cabinet material, such as a metal.
  • the cabinet 100 is formed from aluminum.
  • the cabinet 100 is formed from steel.
  • cabinet 100 can be provided with insulation (not shown) disposed inside the walls and top of the cabinet.
  • cabinet 100 is an above-grade (i.e., above-ground) cabinet and can be mounted on a pad of concrete that provides a stable foundation.
  • the cabinet 100 can be pole mounted for an aerial network.
  • cabinet 100 can further include one or more fans or an air conditioning unit.
  • a battery or external power source can be provided.
  • the interior region of cabinet 100 includes a splitter panel 160, a routing panel 170, and a distribution panel 180.
  • the splitter panel and distribution panel can be conventional rack mounted devices (the rack backbone is omitted for simplicity).
  • the splitter panel includes a plurality of individual splitter units 162 that can provide a 1 (or 2) x N split of the incoming fiber (see e.g., Fig. 6).
  • the splitter panel is preferably a passive device.
  • the routing panel 170 includes a series of fiber guides 171, 173 and cable management spools 172 to manage jumper cables/patch cords coupling the splitter panel 160 to the distribution panel 180.
  • the distribution panel includes a plurality of individual distribution units having terminated fiber drops (thereby acting as patch panel).
  • cabinet 100 can include a wavelength division multiplexing (WDM) panel (not shown) in place of or in addition to splitter panel 160.
  • WDM wavelength division multiplexing
  • cabinet 100 can further include one or more active components.
  • cabinet 100 includes a strain relief and grounding panel 120 that provides strain relief, cable management, and grounding for at least several hundred individual drop cables.
  • this component is a passive device.
  • each drop cable includes a support wire 156, a thermoplastic resin or other jacket 154, one or more sets of strength members 157, and a single fiber 158 or multi-fiber ribbon 159.
  • the support wire comprises a metal wire and the strength members comprise dielectric (e.g., aramid) fibers.
  • dielectric e.g., aramid
  • the cabinet 100 can accommodate other conventional drop fibers, such as a flat drop cable (available from Draka Comteq (e.g., EZ DROP cable), Prysmian, or other manufacturers), as would be apparent to one of skill in the art given the present description.
  • Draka Comteq e.g., EZ DROP cable
  • Prysmian or other manufacturers
  • the drop cables originate at a customer's home, apartment, or premise.
  • the drop cables are fed into cabinet 100 through one or more conduits (e.g., conduits 151 and 152) and can enter cabinet 100 through one or more ports (not shown) located in the base 116.
  • Each drop cable is then routed through the rear interior of the cabinet along rear wall 117 and coupled to the rear portion of distribution panel (see e.g., Fig. 3).
  • the interior region of cabinet 100 also includes one or more feeder cable ports 136A and 136B to receive the one or more feeder cables originating at the CO of the network.
  • These feeder cables are fed into the cabinet 100 by one or more feeder conduits 141 and 142.
  • the fiber lines from the feeder cable(s) are secured via a support plate 135, which provides strain relief. Individual lines are spliced via one or more splice tray units 130 and are subsequently connected to one or more individual splitter units 162 of the splitter panel 160.
  • strain relief and grounding panel 120 comprises a support structure 126 that supports one or more securing plates 121 that include a series of fastening mechanisms to secure the support wires 156 of each individual drop cable entering the cabinet 100.
  • the strain relief and grounding panel 120 can be mounted in the cabinet interior on the base of the cabinet.
  • the strain relief and grounding panel 120 could be mounted to a rear wall or a side wall of the cabinet.
  • the support structure can be the cabinet itself and the securing plates can be mounted to the cabinet.
  • two securing plates 121 A, 121B are shown in a stacked arrangement (with some spacing in between plates), although one, two, three, four, or more securing plates can be utilized.
  • additional securing plates can be spaced behind the front-most securing plate 12 IA.
  • Each plate can be slightly tilted (see e.g., Fig. 3) to provide additional cable management and routing towards the rear of the cabinet.
  • each securing plate can be detachable (either partially or completely) from the strain relief and grounding panel support structure 126 to permit access to rear plates during installation of the drop cables.
  • the securing plates can be hingedly connected to the support structure 126 (e.g., via a downward rotation) to provide more straightforward access to all individual strain relief and grounding panels.
  • the fastening mechanisms comprise lugs 122.
  • Each lug 122 has an entry hole sufficient in size to receive one or more support wires (which are stripped from the drop cables).
  • each lug includes a locking mechanism, such as a screw, bolt or cam lock, to secure the one or more support wires.
  • individual lug 122 A secures a single support wire 156 from a single drop cable 155 (a single drop cable is shown for simplicity purposes only).
  • individual lug 122 A can secure up to four support wires from four individual drop cables.
  • the fastening mechanisms can be configured to secure the strength member portions of one or more of the drops cables.
  • the secured support wires provide relief against axial strains and/or pulling forces as the drop fibers are routed to the distribution panel.
  • the fiber portion of the drop cable 155 is routed through the channel created between the columns of lugs up to the distribution panel.
  • the fastening mechanisms can comprise clamps, clips, or posts and can utilize a spring mechanism to secure the drop cable support wire in place.
  • lugs 122 are arranged in an array of rows and columns for drop cable organization and management. For example, as shown in Fig. 4, the spacing between adjacent columns can form a vertical cable guiding channel 124 of sufficient width to guide a group of drop cables (e.g., four, eight, twelve, sixteen, etc.) towards the distribution panel 180. This arrangement allows for the tight packing and management of drop cables in an organized manner. For example, in one aspect, using the securing plate of Fig. 2, each column of fastening mechanisms can secure up to sixteen support wires - thus two vertical guiding channels can support thirty-two drop cables, which can be fully routed as a bundle to a single distribution panel unit 182.
  • Fig. 2 shows a plate 121A comprising sixty lugs in a 4 x 15 array.
  • Such an exemplary panel 12 IA can thus secure and route two hundred forty drop fibers to the distribution panel.
  • the actual number of rows and columns of fastening mechanisms can be varied for different applications (e.g., an array of 4 x 10, or 4 x 20, etc.).
  • the fiber distribution cabinet 100 can accommodate several hundred fiber drops directly.
  • cabinet 100 can accommodate at least 400 drop cables, and more preferably 480 individual drop cables.
  • up to 1000 drop cables can be accommodated in cabinet 100.
  • a greater or fewer number of drop cables can be accommodated by the cabinet 100, as would be apparent to one of skill in the art given the present description.
  • the one or more securing plates 121 are made of metal and can thus act as a strain relief mechanism, a cable organizer, and as a grounding plate to ground metal support wires.
  • the strain relief and grounding panel 120 can further include one or more arcuate cable supports, such as curved plates 123 A and 123B, which can guide the drop cables around potentially sharp bends. These arcuate cable supports have a curvature that prevents over-bending of the fiber cable, thus preventing a bending of the fiber cable past the minimum bend radius level for a particular type of drop cable.
  • one or more drop cable routing structures such as rings 1 19, can be disposed in the cabinet 100 for further cable guiding.
  • Each individual drop fiber is ultimately terminated in an individual input port of a distribution unit 182 of the distribution panel 180.
  • each distribution panel unit can support up to thirty-two drop fibers.
  • each distribution panel unit 182 is a sliding panel.
  • a plurality of hinged panel units may be utilized.
  • a conventional distribution panel unit such as a model no. 8423 patch panel, available from 3M Company, can be utilized.
  • the drop cable fibers can be terminated inside a sliding panel unit 182 and the bundle can be tied down or otherwise secured in the back of cabinet 100. Once the panel unit 182 is pushed back to its secured position in the mounting rack (not shown), the bundle can have an "S"-shaped bend slack region that allows the panel to be pulled out for maintenance as needed. Referring to Figs. 1 and 6, the feeder fibers are spliced onto connectorized pigtails
  • splitter panel unit 162 which shows an exemplary splitter unit 162, which is configured as a 1 (or 2) by 32 splitter panel.
  • the splitter outputs 164 can then be jumpered by a patch cord (not shown) to one of the many drop cables terminated at the distribution panel 180.
  • strain relief and grounding panel 120 could be utilized in a different telecommunications enclosure.
  • panel 120 could be installed in a conventional cross connect cabinet or enclosure (e.g., indoors, underground, aerial, etc.) thus enabling the cross connect cabinet or enclosure to provide grounding and strain relief for hundreds of home run drop cables.
  • cabinet 100 can omit the splitter panel. In this scheme, feeder cables can be terminated on a feeder panel and cross connected via patch cords to the drop cables terminated on the distribution panel.
  • the cabinet can include a strain relief and grounding panel 120, as is described above.
  • the feeder cable 50 can originate at the CO 10 and be fed directly into cabinet 100.
  • the feeder cable 50 can comprise a 12, 24 or 48 fiber count cable.
  • cabinet 100 is configured as a terminal cabinet, where a large number of drop cables 55 from a MDU or high density neighborhood 20 (e.g., 200 drop cables or more) are terminated in cabinet 100 itself. Thus, additional closures and terminals are not needed to be interposed in the network between the customer and the cabinet.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Light Guides In General And Applications Therefor (AREA)

Abstract

L’invention concerne un dispositif antitraction et un panneau de mise à la masse pour un coffret de télécommunications dans lequel se termine une pluralité de câbles de dérivation. Le dispositif antitraction et le panneau de mise à la masse comprennent au moins une plaque de blocage et un réseau de mécanismes de serrage formés sur ladite plaque de blocage. Les mécanismes de serrage reçoivent et fixent la portion de fil support de la pluralité de câbles de dérivation. Le coffret de télécommunications accueille la pluralité de câbles de dérivation en provenance d’une unité voisine ou d’hébergement multiple haute densité. Le dispositif antitraction et le panneau de mise à la masse peuvent être installés dans une armoire de distribution pour former une armoire terminale.
PCT/US2009/038862 2008-04-03 2009-03-31 Dispositif antitraction pour fibre optique et armoire de distribution Ceased WO2009146022A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US4206008P 2008-04-03 2008-04-03
US61/042,060 2008-04-03

Publications (2)

Publication Number Publication Date
WO2009146022A2 true WO2009146022A2 (fr) 2009-12-03
WO2009146022A3 WO2009146022A3 (fr) 2010-03-18

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2009/038862 Ceased WO2009146022A2 (fr) 2008-04-03 2009-03-31 Dispositif antitraction pour fibre optique et armoire de distribution

Country Status (1)

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WO (1) WO2009146022A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015167904A1 (fr) * 2014-05-01 2015-11-05 Tyco Electronics Corporation Serre-câble
US9983377B2 (en) 2014-06-30 2018-05-29 Corning Optical Communications LLC Enclosure with combined strain relief and grounding

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200385420Y1 (ko) * 2005-03-11 2005-05-27 (주)우진씨앤에스 케이블 수납부가 구비된 광단자함
US7760984B2 (en) * 2006-05-04 2010-07-20 Adc Telecommunications, Inc. Fiber distribution hub with swing frame and wrap-around doors
KR200426037Y1 (ko) * 2006-06-02 2006-09-19 선일텔레콤 주식회사 광케이블 단자함
JP2008032971A (ja) * 2006-07-28 2008-02-14 Fujikura Ltd 後分岐光接続箱

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015167904A1 (fr) * 2014-05-01 2015-11-05 Tyco Electronics Corporation Serre-câble
US9465180B2 (en) 2014-05-01 2016-10-11 Commscope Technologies Llc Strain relief clamp
US9983377B2 (en) 2014-06-30 2018-05-29 Corning Optical Communications LLC Enclosure with combined strain relief and grounding

Also Published As

Publication number Publication date
WO2009146022A3 (fr) 2010-03-18

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