(19) United States
`(12) Patent Application Publication (10) Pub. No.: US 2017/0153406 A1
`Rodriguez
`(43) Pub. Date:
`Jun. 1, 2017
`
`US 2017.0153406A1
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`(54)
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`(71)
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`(72)
`(21)
`(22)
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`(60)
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`MODULAR EQUIPMENT RAIL AND CABLE
`GUIDE SYSTEMIS FOR FIBER OPTC
`EQUIPMENT
`Applicant: Corning Optical Communications
`LLC, Hickory, NC (US)
`Inventor: Diana Rodriguez. Fort Worth, TX (US)
`Appl. No.: 15/365,025
`
`Filed:
`
`Nov. 30, 2016
`
`Related U.S. Application Data
`Provisional application No. 62/261,023, filed on Nov.
`30, 2015.
`
`Publication Classification
`
`(51) Int. Cl.
`GO2B 6/44
`GO2B 6/38
`(52) U.S. Cl.
`CPC ......... G02B 6/4452 (2013.01); G02B 6/3897
`(2013.01)
`
`(2006.01)
`(2006.01)
`
`ABSTRACT
`(57)
`Disclosed are solutions for toollessly and modularly attach
`ing module, tray, and cable routing guides to fiber optic
`equipment trays and hardware. Solutions consistent with the
`present invention also streamline the design of the tray and
`module rail guide system to reduce overall part counts that
`were formerly associated with non-ambidextrous Solutions.
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`US 2017/O153406 A1
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`Jun. 1, 2017
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`MODULAR EQUIPMENT RAIL AND CABLE
`GUIDE SYSTEMIS FOR FIBER OPTC
`EQUIPMENT
`
`CROSS-REFERENCE TO RELATED
`APPLICATION
`0001. This application claims the benefit of priority under
`35 U.S.C.S 119 of U.S. Provisional Application Ser. No.
`62/261,023 filed on Nov. 30, 2015 the content of which is
`relied upon and incorporated herein by reference in its
`entirety.
`
`BACKGROUND
`
`0002 Field
`0003. The technology of the disclosure relates to fiber
`optic hardware and, more particularly, to fiber optic hard
`ware chassis with interchangeable, modular tray and module
`guide hardware.
`0004 Technical Background
`0005 Benefits of optical fiber include extremely wide
`bandwidth and low noise operation. Because of these advan
`tages, optical fiber is increasingly being used for a variety of
`applications, including but not limited to broadband Voice,
`Video, and data transmission. Fiber optic networks employ
`ing optical fiber are being developed and used to deliver
`Voice, video, and data transmissions to Subscribers over both
`private and public networks. These fiber optic networks
`often include separated connection points linking optical
`fibers to provide “live fiber” from one connection point to
`another connection point. In this regard, fiber optic equip
`ment is located in data distribution centers or central offices
`to Support interconnections. For example, the fiber optic
`equipment can Support interconnections between servers,
`storage area networks (SANs), and other equipment at data
`centers. Interconnections may be supported by fiber optic
`patch panels or modules.
`0006. The fiber optic equipment is customized based on
`the application and connection bandwidth needs. The fiber
`optic equipment is typically included in housings that are
`mounted in equipment racks to optimize use of space. The
`data rates that can be provided by equipment in a data center
`are governed by the connection bandwidth supported by the
`fiber optic equipment. The bandwidth is governed by the
`number of optical fiber ports included in the fiber optic
`equipment and the data rate capabilities of a transceiver
`connected to the optical fiber ports. When additional band
`width is needed or desired, additional fiber optic equipment
`can be employed or scaled in the data center to increase
`optical fiber port count. However, increasing the number of
`optical fiber ports can require more equipment rack space in
`a data center. Providing additional space for fiber optic
`equipment increases costs. A need exists to provide fiber
`optic equipment that provides a foundation in data centers
`for migration to high density patch fields and ports and
`greater connection bandwidth capacity to provide a migra
`tion path to higher data rates while minimizing the space
`needed for Such fiber optic equipment.
`
`SUMMARY
`0007. The application discloses a tray for mounting fiber
`optic equipment, the tray comprises a base for Supporting a
`plurality of BASE-8 fiber optic equipment. The tray also
`comprises one or more Support rails of the base for movably
`
`mounting the tray in a fiber optic equipment chassis. The
`tray further comprises a plurality of equipment Support rails
`of the base for movably mounting the plurality of BASE-8
`fiber optic equipment to the tray.
`0008. Additional features and advantages will be set forth
`in the detailed description which follows, and in part will be
`readily apparent to those skilled in the art from the descrip
`tion or recognized by practicing the embodiments as
`described in the written description and embodiments
`hereof, as well as the appended drawings.
`0009. It is to be understood that both the foregoing
`general description and the following detailed description
`are merely exemplary, and are intended to provide an
`overview or framework to understand the nature and char
`acter of the embodiments.
`0010. The accompanying drawings are included to pro
`vide a further understanding, and are incorporated in and
`constitute a part of this specification. The drawings illustrate
`one or more embodiment(s), and together with the descrip
`tion serve to explain principles and operation of the various
`embodiments.
`
`BRIEF DESCRIPTION OF THE DRAWINGS
`(0011
`FIGS. 1A and 1B illustrate perspective views of an
`exemplary cable routing guide and said exemplary cable
`routing guide connected to an equipment tray, respectively,
`in accordance with certain disclosed embodiments;
`0012 FIGS. 2A and 2B illustrate features associated with
`equipment tray for toollessly attaching the tray and module
`rail guides, consistent with certain disclosed embodiments;
`(0013 FIGS. 3A and 3B illustrate perspective and side
`views, respectively, of an cable routing feature toollessly
`attached to an equipment tray, according to certain disclosed
`embodiments;
`0014 FIGS. 4A and 4B illustrate perspective top-down
`and bottom-up views, respectively, of an exemplary mount
`ing rail for use on a tray, in accordance with certain disclosed
`embodiments;
`(0015 FIGS. 5A and 5B illustrate perspective and side
`views, respectively, of an exemplary mounting rail, tool
`lessly attached to an equipment tray, consistent with certain
`disclosed embodiments;
`(0016 FIGS. 6A and 6B illustrate perspective views of an
`exemplary left tray rail and module mounting rails, tool
`lessly attached to left tray rail, consistent with certain
`disclosed embodiments;
`(0017 FIGS. 6C and 6D illustrate perspective views of an
`exemplary right tray rail and module mounting rails, tool
`lessly attached to right tray rail, consistent with certain
`disclosed embodiments;
`(0018 FIGS. 7A and 7B illustrate perspective views of an
`exemplary left and right tray rails, respectively, with module
`mounting rails toollessly attached to the respective left and
`right tray rails and toollessly connected to the equipment
`tray, consistent with certain disclosed embodiments; and
`0019 FIG. 8 is a perspective view of an equipment tray
`adapted to support six (6) fiber optic modules (or panels) per
`tray, in accordance with certain disclosed embodiments.
`
`DETAILED DESCRIPTION
`0020. The application discloses BASE-8 modules, fiber
`optic panel assemblies, and hybrid fiber optic modules for
`mounting in equipment trays that can be mounted in a
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`US 2017/O153406 A1
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`Jun. 1, 2017
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`movable fashion to a chassis. The assemblies disclosed
`provide the ability to easily and quickly migrate an optical
`network between duplex transmission and 8-fiber parallel
`transmission. The BASE-8 configurations are contrary to the
`installed BASE-12 optical networks that are widely
`deployed. Further, the BASE-8 components and assemblies
`can improve fiber utilization rates when requiring quick and
`easy migration path between duplex and parallel transmis
`sion in an optical network.
`0021 Conventional solutions include replacing the cur
`rent MPO/LC breakout duplex modules with MPO panels/
`modules when converting to 8-fiber links for parallel trans
`mission. However, there is a need for flexibility to convert
`back to 2-fiber links as needed when network requirements
`change, such as new lower bandwidth equipment placed in
`cabinet, or a new technology evolving that only requires
`2-fiber duplex connectivity. Hence, the ability to easily
`convert between duplex and 8-fiber parallel transmission
`systems is desired and not currently available with conven
`tional networks. One embodiment is directed to tray for
`mounting fiber optic equipment having a BASE-8 configu
`ration. For instance, the fiber optic equipment having the
`BASE-8 configuration could be a module, a panel assembly,
`a hybrid module, or other suitable fiber optic equipment.
`0022. As used herein, BASE-8 means the component
`Supports transmission of eight optical channels and connects
`with 8-fiber connectors, not 12-fiber connectors. Conse
`quently, all of the optical channels may be used for migrat
`ing between duplex and parallel transmission without having
`unused optical fibers. The concepts are depicted with 8-fiber
`ports such as MPO ports and single fiber ports such as LC
`ports that Support single fiber connectors. Fiber optic equip
`ment and assemblies disclosed may be secured and Sup
`ported in trays, and the trays may be secured and Supported
`in a chassis. Further, the fiber optic equipment may option
`ally move relative to the trays when attached thereto. Like
`wise, the trays may optionally move relative to the chassis
`when attached thereto.
`0023 This disclosure is directed to pre-terminated solu
`tions based around using units of 8-fibers in connectors and
`adapters to match-up with the channels required for an
`8-fiber parallel transceiver. This is in contrast to the con
`ventional 12- and 24-fiber base solutions used in optical
`networks today. Included in this disclosure are trunk cables
`with 8-fiber units, MPO connectors or other suitable con
`nector only populated with 8-fibers, and BASE-8 fiber optic
`equipment such as MPO to LC fiber optic modules, fiber
`optic panel assemblies and hybrid fiber optic modules.
`0024 Generally speaking, a module will include an
`enclosure having an internal chamber, whereas a panel
`assembly will not have an enclosure. A fiber harness is
`typically installed into the internal chamber of the module
`for protecting the same. Panel assemblies may be used for
`optical connection Such as a fiber optic panel assembly
`comprising a front panel disposed at a front end with a linear
`array of fiber optic adapters arranged in a width direction in
`the front panel in a BASE-8 configuration. Further, the
`BASE-8 fiber optic equipment such as the fiber optic panel
`assembly or module may compactly mount into a tray using
`/6 of the tray width or less. In another embodiment, the fiber
`optic panel assembly has a first and second multi-fiber
`adapter disposed at a front end of the fiber optic panel
`assembly and at least one pass-through channel at the rear
`side. Another piece of fiber optic equipment is the hybrid
`
`fiber optic module that Supports connections for eight LC
`connections and an 8-fiber MPO connection at the front end,
`and which provides a quick and easy migration node in the
`network.
`(0025 FIG. 8 illustrates tray 100 for mounting fiber optic
`equipment. Tray 100 may be mounted in a chassis as
`disclosed or other suitable equipment. “Mounting as the
`term is used here, refers to any component or group of
`componenets Suitable for permanenently, semi-permanently,
`temporarily, and/or removably coupling tray 100 to the
`chassis. According to one embodiment, “mounting may be
`effectuated by securing the tray 100 to the chassis using a
`permanent or semi-permanent fastener Such as, for example,
`rivets, bolts, screws, or any other Suitable mechanism (or
`combinations thereof) for fastening one structure to another.
`Alternatively or additionally, “mounting may include or
`embodiment temporary or non-permanent solutions for
`securing tray 100 to the chassis. For example, in certain
`exemplary embodiments, mounting may be effectuated
`using clips, pull-tabs, removable rivets, press-clips, pine
`tree type clips, push-nut fasteners, or any other type of
`fastener suitable for removably coupling tray 100 to chassis.
`“Mounting may also include or embody any component or
`combinations of components suitable for slidably coupling
`tray 100 to the chassis. For example, tray 100 may be
`mounted to the chassis by way of a guide rail coupled to the
`chassis that, when coupled to a corresponding rail compo
`nent of tray 100, supports and guides tray 100, allowing for
`forward-rearward translation of tray 100 relative to chassis.
`0026. Tray 100 comprises a base for supporting a plural
`ity of BASE-8 fiber optic equipment. For instance, the tray
`can include module and/or panel assembly. The tray com
`prises one or more support rails 104a, 104b of the base for
`movably mounting the tray 100 in a chassis. The tray also
`comprises a plurality of equipment Support rails 106 of the
`base for movably mounting the plurality of BASE-8 fiber
`optic equipment to the tray 100. Support rails and/or the
`equipment Support rails may be modular components or may
`be integrally formed with the base of the tray as desired.
`0027 Base is configured to support at least five (5) pieces
`of BASE-8 fiber optic equipment in a width direction. Tray
`100 has a height of /3 U-Space or less. The tray may support
`a connection density of greater than thirty-two (32) fiber
`optic connections, at least forty (40) fiber optic connections,
`and forty-eight (48) fiber optic connections per '/3 U-space
`with a BASE-8 configuration.
`0028. As depicted in FIG. 8, the tray is configured to
`support at least six pieces of BASE-8 fiber optic equipment
`equipment in the width W direction. Thus, module is con
`figured to mount into tray 100 using /6 of the tray width W
`or less. The trays disclosed can be designed to be installable
`into existing installed base of chassis, thereby forming
`hybrid chassis having a first tray that supports BASE-8 fiber
`optic equipment and a second tray that Supports BASE-12
`fiber optic equipment.
`(0029 FIGS. 1A and 1B illustrate perspective views of an
`exemplary cable routing guide and said exemplary cable
`routing guide connected to an equipment tray, respectively,
`in accordance with certain disclosed embodiments. Simi
`larly, FIGS. 2A and 2B illustrate features associated with
`equipment tray for toollessly attaching the tray and module
`rail guides, consistent with certain disclosed embodiments;
`0030 Tray 100 may be mounted in a chassis as disclosed
`or other suitable equipment. “Mounting as the term is used
`
`

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`US 2017/O153406 A1
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`Jun. 1, 2017
`
`here, refers to any component or group of componenets
`Suitable for permanenently, semi-permanently, temporarily,
`and/or removably coupling tray 100 to the chassis. Accord
`ing to one embodiment, “mounting may be effectuated by
`securing the tray 100 to the chassis using a permanent or
`semi-permanent fastener Such as, for example, rivets, bolts,
`screws, or any other Suitable mechanism (or combinations
`thereof) for fastening one structure to another. Alternatively
`or additionally, "mounting may include or embodiment
`temporary or non-permanent solutions for securing tray 100
`to the chassis. For example, in certain exemplary embodi
`ments, mounting may be effectuated using clips, pull-tabs,
`removable rivets, press-clips, pine-tree type clips, push-nut
`fasteners, or any other type of fastener suitable for remov
`ably coupling tray 100 to chassis. “Mounting may also
`include or embody any component or combinations of
`components suitable for slidably coupling tray 100 to the
`chassis. For example, tray 100 may be mounted to the
`chassis by way of a guide rail coupled to the chassis that,
`when coupled to a corresponding rail component of tray 100,
`supports and guides tray 100, allowing for forward-rearward
`translation of tray 100 relative to chassis.
`0031. According to the embodiments shown in FIGS. 1A
`and 1B, various features of the tray assembly may be
`modularly and toollessly mounted to tray 100. For example,
`as illustrated in FIGS. 3A and 3B, cable routing features may
`include a clip-lock system 1312 that is designed to cooperate
`with features for receiving cable routing guides 1310 and
`locking cable routing guides into place, without requiring
`screws or requiring fewer tool-based fasterners than con
`ventional modular systems.
`0032 FIG. 2B illustrates a Zoom-in, perspective front
`view of tray 100 with multiple features 107 for receiving a
`plurality of module guide features shown in FIGS. 4A and
`4B. As illustrated in FIGS. 2A and 2B, tray 100 may include
`one or more access holes 1320. According to one embodi
`ment, access holes 1320 may include or embody a rectan
`gular opening in the bottom of the tray. In certain embodi
`ments, access holes 1320 may be made wide enough to
`allow finger access to modules 10 from underneath tray, and
`to allow the shutters on panels to rotate open greater than 90
`degrees. Access holes 1320 are sized to correspond with the
`footprint of BASE-8 modules and panels, but may be sized
`to support width of either hybrid panels or BASE-12 panels
`and BASE-8 simultaneously (or any combination thereof).
`0033 FIGS. 4A and 4B illustrate perspective views of an
`exemplary mounting rail 106 for use on a tray 100, in
`accordance with certain disclosed embodiments. FIGS. 5A
`and 5B illustrates a perspective view of an exemplary tray
`100 equipped with the exemplary mounting rails 106 of
`FIGS. 4A and 4B, consistent with certain disclosed embodi
`ments. As illustrated in the embodiment of FIG. 4A and 4B,
`the slide mount system of module rail 106 has a groove 108
`and peg 109. According to the embodiment shown in FIG.
`5A and 5B, groove 108 engages with corresponding slots
`107 on tray 100 and slides into the tray. When the module
`rail is completely engages with slot 107 on tray 100, peg 109
`engages a corresponding hole on tray 100 and locks the
`module rail into place.
`0034 FIGS. 6A and 6B illustrate perspective views of an
`exemplary left tray rail and module mounting rails, tool
`lessly attached to left tray rail, consistent with certain
`disclosed embodiments. FIGS. 6C and 6D illustrate perspec
`tive views of an exemplary right tray rail and module
`
`mounting rails, toollessly attached to right tray rail, consis
`tent with certain disclosed embodiments. FIGS. 7A and 7B
`illustrate perspective views of an exemplary left and right
`tray rails, respectively, with module mounting rails tool
`lessly attached to the respective left and right tray rails and
`toollessly connected to the equipment tray, consistent with
`certain disclosed embodiments.
`0035 FIG. 8 provides a view of the equipment trays, in
`accordance with certain disclosed embodiments. As shown
`in FIG. 8, tray 100 may include a plurality of routing guide
`Support fingers (not separately numbered) that extend out
`wardly toward the front of tray 100 for supporting cable
`routing guides 1310. The metallic support structure of tray
`100 corresponding to the routing guide Support fingers is
`sized of thickness and length to provide for optimal hand and
`finger access to modules, panels, or other equipment asso
`ciated with chassis. Similarly, the tray rail mounting Support
`(not separately numbered) of tray 100, which extends
`toward the rear of the tray 100 from opposing lateral edges
`of tray 100, are also sized of thickness and length to allow
`access to the thumb release left rear and the finger tab right
`rear positions.
`0036. Unless otherwise expressly stated, it is in no way
`intended that any method set forth herein be construed as
`requiring that its steps be performed in a specific order.
`Accordingly, where a method embodiment does not actually
`recite an order to be followed by its steps or it is not
`otherwise specifically stated in the embodiments or descrip
`tions that the steps are to be limited to a specific order, it is
`no way intended that any particular order be inferred.
`0037. It will be apparent to those skilled in the art that
`various modifications and variations can be made without
`departing from the spirit or scope of the disclosure. Since
`modifications combinations, Sub-combinations and varia
`tions of the disclosed embodiments incorporating the spirit
`and Substance of the disclosure may occur to persons skilled
`in the art, the disclosure should be construed to include
`everything within the scope of the appended embodiments
`and their equivalents.
`We claim:
`1. A tray for mounting fiber optic equipment, the tray
`comprising:
`a base for supporting a plurality of BASE-8 fiber optic
`equipment;
`one or more support rails of the base for movably mount
`ing the tray in a fiber optic equipment chassis; and
`a plurality of equipment Support rails of the base for
`movably mounting the plurality of BASE-8 fiber optic
`equipment to the tray.
`2. The tray of claim 1, wherein the BASE-8 fiber optic
`equipment is a module or a panel assembly.
`3. The tray of claim 1, wherein the base is configured to
`support at least five (5) BASE-8 pieces of fiber optic
`equipment in a width direction.
`4. The tray of claim 1, wherein the base is configured to
`support at least six (6) pieces of BASE-8 fiber optic equip
`ment in a width direction.
`5. The tray of claim 1, wherein the tray has a height of /3
`U-space or less.
`6. The tray of claim 1, wherein the tray supports a
`connection density of greater than thirty-two (32) fiber optic
`connections.
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`US 2017/O153406 A1
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`Jun. 1, 2017
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`7. The tray of claim 1, wherein the tray supports a
`connection density of at least forty (40) fiber optic connec
`tions per '/3 U-space.
`8. The tray of claim 1, wherein the tray supports a
`connection density of forty-eight (48) fiber optic connec
`tions per '/3 U-space.
`9. The tray of claim 1, wherein the base is configured to
`support at least five (5) BASE-8 fiber optic equipment.
`10. The tray of claim 1, wherein the base is configured to
`support at least six (6) BASE-8 fiber optic equipment.
`11. The tray of claim 1, further comprising a fiber optic
`equipment chassis having a plurality of trays mounted
`therein and Supporting a connection density of greater than
`ninety-six (96) fiber optic connections per one U-space.
`12. The tray of claim 1, further comprising a fiber optic
`equipment chassis having a plurality of trays mounted
`therein and Supporting a connection density of at least one
`hundred twenty (120) fiber optic connections per one
`U-space.
`13. The tray of claim 1, further comprising a fiber optic
`equipment chassis having a plurality of trays mounted
`therein and Supporting a connection density of at least one
`hundred forty-four (144) fiber optic connections per one
`U-space.
`14. A fiber optic equipment comprising:
`a front panel disposed at a front end of the fiber optic
`panel assembly;
`a linear array of fiber optic adapters arranged in a width
`direction in the front panel in a BASE-8 configuration,
`wherein the fiber optic adapters are configured to
`
`Support a plurality of optical fibers optically connected
`between the plurality of fiber optic adapters and a rear
`end of the fiber optic assembly:
`wherein the fiber optic assembly is configured to mount
`into a tray using /6 of the tray width or less.
`15. The fiber optic equipment of claim 14, the linear array
`of fiber optic adapters having LC ports.
`16. The fiber optic equipment of claim 14, further com
`prising a housing extending between the front panel and the
`rear end of the fiber optic assembly.
`17. The fiber optic equipment of claim 14, wherein the
`housing is an enclosure.
`18. A fiber optic module comprising:
`a housing having a front side;
`a linear array of fiber optic adapters arranged in a width
`direction in the front side in a BASE-8 configuration,
`wherein the fiber optic adapters are configured to
`Support a plurality of optical fibers optically connected
`between the fiber optic adapters and a rear side of the
`fiber optic assembly:
`wherein the fiber optic module is configured to mount into
`a tray using/6 of the tray width or less.
`19. The fiber optic module of claim 18, wherein the linear
`array of fiber optic adapters Support eight LC connections.
`20. The fiber optic module of claim 18, wherein the
`module has an adapter extending from the rear side.
`21. The fiber optic module of claim 18, wherein the
`module has a pigtail extending from the rear side.
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