MANAGEMENT DEVICE FOR HYBRID CABLE
20230261452 ยท 2023-08-17
Inventors
Cpc classification
G02B6/4446
PHYSICS
International classification
Abstract
An enclosure includes a management insert disposed within a housing to divide the interior into three levels. Hybrid cables enter the housing at the first level. Electrical conductors of the hybrid cables are terminated at the second level. Optical fibers of the hybrid cables are terminated at the third level. Excess length of the optical fibers may be stored at the third level. The management insert may be fastened to the housing using plugs received at select ones of the cable entrance/exit locations. A dedicated furcation enclosure is also disclosed.
Claims
1.-25. (canceled)
26. A method for concealing and managing a furcation location of a hybrid cable having first and second different types of transmission lines, the method comprising: concealing the furcation location within a furcation enclosure that mounts to a structure within a telecommunications room of a building, the furcation enclosure including an entrance opening for receiving the hybrid cable and first and second exit openings for respectively receiving the first and second different types of transmission lines, the enclosure including an internal divider at which the first and second types of transmission lines are separated from one another to facilitate separately routing the first and second types of transmission lines to their respective first and second exit openings, the furcation enclosure not including termination functionality.
27. The method of claim 26, wherein the structure within the telecommunications room is a wall.
28. The method of claim 26, wherein the structure within the telecommunications room is a frame or a rack.
29. The method of claim 26, wherein the structure within the telecommunications room is a transmission line trough.
30. The method of claim 26, wherein the structure within the telecommunications room is a transmission line runway.
31. The method of claim 26, wherein the enclosure includes a base adapted to be connected to the structure, wherein the internal divider mounts to the base, and wherein the enclosure includes a front cover that removably mounts to the base and defines the entrance opening, the first exit opening and the second exit opening.
32. The method of claim 31, wherein the furcation is positioned within an inner volume of the enclosure defined between the base and the front cover.
33. The method of claim 26, wherein the enclosure includes transition line guides that define a first transition line path from the divider to the first exit opening and a second transition line path from the divider to the second exit opening.
34. The method of claim 26, wherein the first exit opening is further subdivided into separate sections for separating the first type of transition lines into smaller groups or individually, and wherein the second exit opening is further subdivided into separate sections for separating the second type of transition lines into smaller groups or individually.
35. The method of claim 34, wherein multiple hybrid cables are routed into the enclosure, and wherein the first type of fiber transition lines are subdivided at the first exit opening based on which of the hybrid cables they correspond to, and wherein the second type of fiber transition lines are subdivided at the second exit opening based on which of the hybrid cables they correspond to.
36. A furcation enclosure comprising: a housing including an entrance opening for receiving a hybrid cable and first and second exit openings for respectively receiving first and second different types of transmission lines broken out from the hybrid cable within the housing, the housing including a base adapted to be connected to an external structure, the housing also including a front cover that removably mounts to the base and covers a front side of the base, wherein the front cover cooperates with the base to define the entrance opening, the first exit opening and the second exit opening; portions of the entrance opening, the first exit opening and the second exit opening defined by the front cover having open rear sides when the front cover is disconnected from the base; an internal divider at which the first and second types of transmission lines are separated from one another to facilitate separately routing the first and second types of transmission lines to their respective first and second exit openings, the internal divider being provided at the front side of the base and being located within an interior of the housing when the front cover is mounted to the base.
37. The furcation enclosure of claim 36, wherein the furcation enclosure does not include termination functionality.
38. The furcation enclosure of claim 36, wherein the enclosure includes transition line guides that define a first transition line path from the divider to the first exit opening and a second transition line path from the divider to the second exit opening.
39. The furcation enclosure of claim 36, wherein the first opening is further subdivided into separate sections for separating the first type of transition lines into smaller groups or individually, and wherein the second opening is further subdivided into separate sections for separating the second type of transition lines into smaller groups or individually.
40. The furcation enclosure of claim 36, wherein the entrance opening incudes a first entrance opening and a second entrance opening, wherein the divider includes a first divider corresponding to the first entrance opening and a second divider corresponding to the second entrance opening, wherein the enclosure includes transition line guides that define a first transition line path from the first divider to the first exit opening, a second transition line path from the divider to the second exit opening, a third transition line path from the second divider to the first exit opening, and a fourth transition line path from the second divider to the second exit opening.
41. The furcation enclosure of claim 36, further comprising bend radius limiters attached to the front side of the base, wherein the internal divider is positioned between a pair of the bend radius limiters.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
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DETAILED DESCRIPTION
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[0044] Hybrid cables are typically understood to include both electrical transmission lines (e.g., copper transmission lines such as co-axial transmission lines, twisted pair transmission lines, copper power lines such as stranded or solid copper wires) and fiber optic transmission lines (e.g., single mode or multi-mode fiber). As used herein, a hybrid cable includes any type of cable having at least two different types of transmission lines (e.g., electrical and optical transmission lines, different types of electrical transmission lines, different types of optical transmission lines).
[0045] The housing 22 can include a main body 26 defining an interior 28 in which the management device 24 is mounted, and a cover 30. In certain examples, the cover 30 is mounted to the main body 26 at a front of the housing 22 and can be moved from a closed position to an open position to allow access to the interior 28 of the housing 22. In certain examples, the cover 30 is pivotally connected to the main body 26. In certain examples, the main body 26 includes a base 39 adapted for connection to a wall or other structure. The main body 26 also includes opposing top and bottom walls 33, 35 and opposing side walls 29, 31 that project forwardly from the base 39. In certain examples, the walls 29, 31, 33, 35 can include knock-outs 37 that can be removed from the walls to open cable access ports through which cables or portions of cables can be routed into the interior of the housing 22. In certain examples, the housing 22 is a National Electrical Manufacturers Association (NEMA) rated box (e.g., Type 1 rated). In the depicted example, the base defines fastener openings 27 adjacent the walls 29, 31, 33, 35 for receiving fasteners (e.g., screws, bolts, nails, etc.) used to secure the housing 22 to a structure such as a wall of a building.
[0046] Referring the schematic depiction of
[0047] As shown at
[0048] The second level 34 is reserved for providing electrical connections between electrical conductors of the hybrid cables (e.g., between the electrical conductors of outdoor and indoor hybrid cables). Thus, the second level 34 can include an electrical conductor connection location 40, which may include an electrical termination block or blocks. Example electrical connection structures include insulation displacement contacts having blades that engage and electrically contact the electrical conductors or threaded electrical connection elements, such as screw-type electrical connectors, where electrical conductors, such as wires, are clamped down on metal parts by screws.
[0049] The third level 36 defined by the management device 24 is preferably reserved for managing optical fibers of the hybrid cables routed into the enclosure through the cable entrance/exit location at the first level 32. The third level 36 can include an optical connection location 41, which may provide for managing optical splices or can include structures for promoting dematable optical connections between optical fibers (e.g., fiber optic adapters that may be arranged in bank, and can include one or more adapted modules such as adapter blocks). The optical connections can be between optical fibers of indoor and outdoor hybrid cables. A fiber optic adapter is typically a structure having opposite ports for receiving fiber optic connectors such that optical fibers terminated by the fiber optic connectors are coupled together in co-axial alignment with each other. A fiber optic adapter for coupling together single fiber optical connectors often includes an internal ferrule alignment sleeve that receives and coaxially aligns ferrules of the fiber optic connectors being coupled together. Example fiber optic connectors can include LC and SC connectors. The fiber optic connectors are mounted at the ends of the optical fibers with the optical fibers having bare fiber portions secured within the ferrules of the fiber optic connectors.
[0050] The third level 36 can also include one or more fiber storage regions 43, such as spools, for providing storage of excess fiber length at the third level 36. The third level 36 is more readily accessible because it is positioned adjacent the openable side of the housing 22. By separating the electrical and fiber optic connection regions, the more delicate fibers are less likely to be damaged.
[0051] Referring to
[0052] Each of the fiber optic cables 42, 44 are hybrid cables that can include a plurality of optical fibers 46 and a plurality of electrical conductors 47 (e.g., braided or solid conductors such as copper conductors). The electrical conductors 47 of the outdoor cable 42 are shown electrically connected to the electrical conductors 47 of the indoor cable 44 at the electrical conductor connection location 40 provided at the second level 34. The optical fibers 46 of the cables 42, 44 are shown terminated with fiber optic connectors 49 and are optically connected to one another at the dematable fiber optic connection location 41 provided at the third level 36. Excess length of the optical fibers 46 is stored at the storage location 43 (e.g., one or more spools) at the third level 36.
[0053] In certain examples, the optical fibers of the outdoor cable 42 and/or the indoor cable 44 are coated optical fibers having a core, a cladding layer, and a coating layer surrounding the cladding layer. In certain examples, the coated fibers can be broken out from the cables and up-jacketed with furcation tube to provide further protection within the housing 22. In certain examples, the optical fibers of the outdoor cable 42 and/or indoor fiber optic cable 44 are buffered optical fibers in which the core and the cladding are protected by a coating layer as well as a buffered layer around the coating layer. Typically, a coating layer has an outer diameter of about 200-260 microns while a buffer layer generally has an outer diameter in a range of 500-950 microns. In certain examples, the fiber optic connectors can be directly terminated at the ends of the optical fibers (e.g., field terminated or factory terminated) of the indoor cable and/or the outdoor cable. In certain examples, the fiber optic connectors can be part of fiber optic pigtails that are spliced to the ends of the optical fibers of the indoor cable and/or the outdoor cable. Each pigtail can include a length of optical fiber having a first end adapted to be spliced to one of the optical fibers of a cable and a second end at which a fiber optic connector has been factory terminated.
[0054] Referring to
[0055] Referring to
[0056] Referring to
[0057] The management device 24 includes spacers, such as legs 308, that space the main deck 300 forwardly from the base 39 such that the deck 300 is positioned at an intermediate location along a depth of the housing 22. The legs 308 can be unitary with the main deck 300 and can be positioned at the opposite ends 302, 304 of the main deck 300. In certain implementations, the legs 308 can be fastened to the housing 22 to secure the management device 24 within the main housing body 26.
[0058] As shown in
[0059] The management device 24 can include end walls 310, 312 (see
[0060] An open space 45 is provided between the adapter mounting member 314 and the deck 300 for allowing electrical conductors to be routed between the deck 300 and the adapter mounting member 314 to the electrical conductor connection location 40. The electrical conductor connection location 40, depicted as an electrical termination block, is mounted directly at a top side of the deck 300 at a level lower than the fiber optic adapters. In the depicted example, the electrical conductor connection location 40 and the optical fiber connection location 41 are both positioned adjacent the same end 302 of the deck 300. In other examples, the connection locations 40, 41 can be positioned at opposite ends 302, 304 of the deck 300.
[0061] A spool mount 316 projects from the end wall 312 over the main deck 300. Open routing space 49 is provided beneath the spool mount 316 between the deck 300 and the spool mount 316. A spool for storing optical fiber is mounted at a top side of the spool mount 316.
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[0063] Optical fibers (see the lines labeled with circles in
[0064] In some implementations, the management device 24 is configured to align the knock-outs 37 with the first level 32 so that all of the optical fibers and electrical conductors of the cables 42, 44 enter at the first level 32. However, in other implementations, one or more of the knock-outs 37 may at least partially align with the second level.
[0065] Aspects of the present disclosure also relate to enclosures for protecting and concealing furcation locations (e.g., bifurcation locations) for hybrid cables. For example,
[0066] In certain examples, furcation enclosures in accordance with the principles of the present disclosure can include functionality for dividing/separating different types of transmission lines from one another while protecting the transmission lines and providing an aesthetically pleasing appearance. In certain examples, such enclosures provide a covered furcation function without providing additional termination functionality such as optical splicing, connectorized dematable optical or electrical interconnections, or the like. In certain examples, such enclosures can be used in telecommunications rooms of buildings and can be wall mounted, cable trough mounted, rack mounted, or cable runway mounted.
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[0068] The base 530 is adapted to be connected to an external structure such as a wall, a rack, a trough, a runway, or other structure. In one example, the base 530 is adapted to be mounted to an external structure within a telecommunications room of a building. In one example, the base 530 can be secured to an external structure by fasteners (e.g., screws, bolts, clips, etc.) that extend through mounting openings 538 defined through a main body of the base 534 through mounting tabs 540 that project outwardly from the main body of the base 530. In other examples, the base 530 can include a mounting bracket, mounting hooks, strap receivers, or other arrangements for facilitating mounting the base 530 to an external structure. In certain examples, cable anchoring structures can be provided on the base 530 for securing the hybrid cable 526 to the base 530 adjacent the entrance opening 524. Example anchoring structures can include cable clamps, cable tie locations, and other structures for securing a jacketed end of the hybrid cable 526 to the base 530 or for securing strength members of the cable 526 to the base 530. The front cover 532 can be secured to the base 530 in a manner in which the front cover 532 is attached to the base 530 but also can be removed from the base to access the front side of the base 530. For example, the front cover 532 can be secured to the base 530 by a snap-fit connection, latches, clips, interlocks or other structures.
[0069] The enclosure 520 further includes an internal divider 542 at which the first and second types of transmission lines 422, 424 of the hybrid cable 426 are separated from one another to facilitate separately routing the first and second types of transmission lines 422, 424 to their respective first and second exit openings 432, 434. The internal divider 542 is provided at the front side 534 of the base 530 and is located within an interior of the housing 522 when the front cover 532 is mounted to the base 530. The internal divider 542 is preferably attached to the front side 534 of the base 530 so as to be carried with the base 530. In this way, the internal divider 542 remains with the base 530 when the front cover 532 is removed from the base 530 to access the front side of the base 530. The internal divider 542 includes a first portion 544 (e.g., an upper portion) configured for initially separating the first and second types of transmission lines 422, 424 after the transmission lines of 422, 424 have been broken out from the jacket of the hybrid cable 426. The internal divider 542 can also include a second portion 546 for maintaining separation between the transmission lines 422, 424 after the transmission lines 422, 424 have initially been separated and as the transmission lines 422, 424 are routed to their respective first and second exit openings 432, 434.
[0070] In use, the base 530 can be secured to an external structure, and the front cover 532 can be removed from the base 530 thereby exposing the front side 534 of the base 530 and the internal divider 542. The hybrid cable 426 is preferably processed to remove/strip the outer jacket to break-out lengths of the first and second types of transmission lines 422, 424 which extend outwardly beyond an end of the outer jacket of the cable 426. With the front cover 532 removed from the base 530, the jacketed end of the cable 526 can be anchored to the base 530 at a location above the internal divider 542. The first and second transmission lines 422, 424 can then be routed across the front side of the base 530 and can be separated by the internal divider 542. Once the first and second transmission lines 422, 424 have been separated from one another by the internal divider 542, the front cover 532 can be re-attached to the base 530 to cover and protect the bifurcation location. It will be appreciated that the open rear sides 536 of the first and second exit openings 532, 534 allow the hybrid cable 526 and the first and second transmission lines 422, 424 to be pre-routed on the base 530 prior to installation of the cover 532. In other words, the open rear sides 536 allow the hybrid cable 526 and the separated transmission lines 422, 424 to be positioned in their corresponding openings 524, 526, 528 at the time the front cover 532 is installed on the base 530.
[0071] The first portion 544 of the internal divider 542 has a tapered configuration for guiding separation of the first and second transmission lines 422, 424. In the depicted example, the first portion 544 has a curved nose that preferably complies with bend-radius requirements of the transmission lines 422, 424. The second portion 546 of the internal divider 542 extends below the first portion 544 and is elongate along a length L. In certain examples, transition line guides 543 can be attached to the second portion 546 for guiding the transmission lines along separate first and second transition line paths from the divider to the respective first and second exit openings 532, 534. In certain examples, the transition line guides 543 can include fingers, loops, partial loops, brackets, bend radius limiters, projections or other structures suitable for guiding transmission lines along paths to their corresponding exit openings. In other examples, further transition line guides 543 can be attached to the base 530 at locations offset from the internal divider 542 for use in extending the transition line paths from the divider to one of the exit openings 532, 534. As shown at
[0072] Referring to
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[0074] Enclosures in accordance with the principles of the present disclosure can be mounted within telecommunications rooms of buildings. For example, enclosures in accordance with the principles of the present disclosure can be mounted to structures such as walls, runways, cable/fiber troughs, and racks.
[0075] Aspects of the present disclosure also relate to a method for concealing and managing a furcation location of a hybrid cable 426 having first and second different types of transmission lines 422, 424. The method includes concealing the furcation location within a furcation enclosure (e.g., enclosure 520 or enclosure 620) that mounts to a structure within a telecommunications room of the building. The furcation enclosure includes an entrance opening for receiving the hybrid cable and first and second exit openings for respectively receiving the first and second different types of transmission lines. The enclosure includes an internal divider (e.g., internal divider 542) at which the first and second types of transmission lines are separated from one another to facilitate separately routing the first and second types of transmission lines to the respective first and second exit openings. In one example, furcation enclosure does not include termination functionality. In certain examples, the furcation enclosure is mounted to a wall, a rack, a trough or a runway within the telecommunications room.