Abstract: A calibration assembly has a base and mounting elements to mount the base to a laser. The base has a front, middle and rear portions that are used to align the calibration assembly to the laser to cleave optical fibers with the laser. The front portion has a channel to receive the optical fibers, the middle portion has openings to confirm alignment of the laser; and the rear portion has a rear opening used to adjust the pitch and roll of the laser.

Abstract: An optical fiber cable includes a first cable segment; a second cable segment; and a splice enclosure. The first cable segment can have a different configuration than the second cable segment. The splice enclosure is coupled to the strength member and strength component of the first cable segment and the second cable segment. One example splice enclosure includes a first enclosure member and a second enclosure member. The strength component can be glued to one end of the splice enclosure and the strength member can be clamped or otherwise retained by another end of the splice enclosure.

Abstract: A variably configurable fiber optic terminal as a local convergence point in a fiber optic network is disclosed. The fiber optic terminal has an enclosure having a base and a cover which define an interior space. A feeder cable having at least one optical fiber and a distribution cable having at least one optical fiber are received into the interior space through a feeder cable port and a distribution cable port, respectively. A movable chassis positions in the interior space and is movable between a first position, a second position and third position. The movable chassis has a splitter holder area, a cassette area and a parking area. A cassette movably positions in the cassette area. A splitter module holder having a splitter module movably positioned therein movably positions in the splitter holder area. The optical fiber of the feeder cable and the optical fiber of the distribution cable are optically connected through the cassette, which also may be through the splitter module.

Abstract: The fiber optic hinge can mechanically connect a first fiber optic tray and a second fiber optic tray of a fiber optic device, while providing an optical fiber path extending continuously through the first and second hinge members.

Abstract: A light-guiding cover structure includes a top cover unit and a light-guiding unit. The top cover unit has a plurality of receiving spaces formed therein. The light-guiding unit includes a plurality of light-guiding groups, wherein each light-guiding group includes a plurality of optical fiber cables received in the corresponding receiving space, and each optical fiber cable has two opposite ends exposed from the bottom surface of the top cover unit and respectively facing at least one light-emitting device and at least one light-sensing device that have been disposed under the top cover unit. Therefore, the optical fiber cables received in the corresponding receiving space, thus when the light-guiding cover structure is applied to the LED package chip classification system, the aspect of the LED package chip classification system can be enhanced.

Abstract: An inner sleeve has a main body with an opening therein and a front and back end. The back end has projections or extensions to engage corresponding cavities on another inner sleeve to allow for movement of the inner sleeves relative to a outer portion into which the inner sleeves have been inserted. The outer portion may accommodate any number of inner sleeve pairs.

Abstract: Fiber optic enclosures employing clamping assemblies for strain relief cables and related assemblies and methods are disclosed. The fiber optic enclosures may be part of a fiber optic terminal in a fiber optic network. The fiber optic enclosures may include openings in the walls of the fiber optic enclosure. A cable fitting assembly may be attached to a portion of the wall around an opening to form a passageway for fiber optic cables to enter the fiber optic enclosure. An elongated member may be used to guide the fiber optic cables through the passageway. The elongated member may have a first end and second end. The elongated member may include a clamping assembly at the first end to provide strain relief to the fiber optic cables by clamping strength members of the fiber optic cables.

Abstract: An optical fiber adapter security, an optical fiber connector security, and a removal tool for use therewith are introduced. The removal tool includes a first body and two second resilient arms. The first body has a first coupling unit. The first coupling unit matches the optical fiber connector security. The second resilient arms are connected to the first body and connected to second coupling units, respectively. The second resilient arms match the optical fiber connector security. The second resilient arms and the second coupling units together match the optical fiber adapter security. The optical fiber adapter security prevents improper use of the optical fiber adapter. The optical fiber connector security prevents inappropriate removal of the optical fiber connector set. Protection provided by the optical fiber adapter security and the optical fiber connector security can be disabled by the same removal tool.

Abstract: An adapter panel arrangement including a chassis and a panel of adapters. The adapters defining rearward cable connections and forward cable connections of the panel arrangement. Openings permitting access to the rearward and forward cable connections of the adapters are provided. The chassis further including a removable rear chassis portion to provide access to cable routing areas within the chassis interior.

Abstract: Disclosed are robust packaging systems and methods for optical elements used in optical light pipes. One optical light pipe includes a housing having opposing first and second ends and a body that extends therebetween, an optical element arranged within the housing, and a reflective coating applied about an outer surface of the optical element.

Abstract: A flexible dust cover is provided for use with a parallel optical communications module for preventing airborne matter, such as dirt, dust, and gases from entering the module. The flexible dust cover fits snugly to the module to protect components of the module and the optical pathways of the module from airborne matter. The flexible dust cover has an elasticity that allows it to be temporarily deformed from its original shape to a stretched state by application of a stretching force to enable the module to be inserted into a central opening formed in the cover. The force is then removed, causing the cover to attempt to return to its original, non-stretched shape. When this happens, interior surfaces of the cover form a snug fit about exterior surfaces of the module. This snug fit fills in air gaps in the module that would otherwise be exposed to the environment.

Abstract: Embodiments of the invention include an apparatus including an optical fiber having a distal end configured to emit a beam of energy. The apparatus also includes a tube including a tube channel. The distal end of the optical fiber is disposed in the tube channel. The apparatus further includes a shock absorber disposed on the tube and a cap disposed on the shock absorber.

Abstract: A fiber holder which can wind an optical fiber easily and accurately, and hold an optical fiber in a wound state is provided. The optical fiber is accommodated in the groove (introduction portion) formed on the fiber bobbin, after that, the bobbin cover is rotated in the rotational direction of the helical groove while the optical fiber is kept in contact with the cutout formed in the bobbin cover. With this, the optical fiber can be accommodated in the groove. Thus, the optical fiber can be wound easily and accurately, and the optical fiber can be held on the fiber bobbin.

Abstract: Some embodiments include a latch mechanism and an optoelectronic module that includes the latch mechanism. The latch mechanism may include a driver, a follower, a pivot member, and a cam member. The driver may be configured to rotate relative to a housing of the optoelectronic module about an axis of rotation. The follower may be configured to be slidably positioned relative the housing. The follower may include a resilient member configured to interface with the housing and may define an opening including a protuberance. The pivot member may be coupled to the driver or to the housing and may define the axis of rotation. The cam member may be coupled to the driver and may be configured to engage the follower from within the opening so as to urge the follower to slide relative to the housing as the driver is rotated between a latched position and an unlatched position.

Abstract: Provided is a fiber management spool, the spool including a barrel extending up from a bottom portion. The spool further includes at least one outer fiber retaining arm extending up from an annular portion of the bottom portion and the annular portion extends radially away from an outer circumferential surface of the barrel. The at least one snap finger extends downward from a central portion of the bottom portion, wherein the snap finger is configured to engage a panel to releasably secure the spool to the panel.

Abstract: A fiber optic adapter system includes a fiber optic adapter and a mounting bracket. The fiber optic adapter includes a first interlock feature. The mounting bracket defines a channel having a longitudinal channel axis and a longitudinally extending lateral side opening. The mounting bracket includes a second interlock feature. The fiber optic adapter and the mounting bracket are relatively configured to enable a user to interlock the first and second interlock features to secure the fiber optic adapter to the mounting bracket by inserting the fiber optic adapter into the channel through the lateral side opening in an insertion direction transverse to the channel axis.

Abstract: An automated fiber optic connector processing system for processing a plurality of fiber optic cables and connectors, with each of said cables including an optical fiber, includes a pallet fixture for holding a plurality of fiber optic cables and connectors during movement along a manufacturing line so that the connectors may be secured to the cable ends, and the ends of the cables finished. The pallet fixture includes a pallet base plate, with a stationary fixture mounted along one edge of the pallet base plate. The stationary fixture defines a plurality of channels for receiving fiber optic cable connectors of the plurality of fiber optic cables, and at least one latching plate for retaining the connectors in the plurality of channels. An oven having an elongated oven opening is provided at a first processing station.

Abstract: An insect-infestation prevention device and a fiber optic telecommunications equipment including an insect-infestation prevention device is disclosed. The fiber optic telecommunications equipment includes a housing with a main housing portion defining a first transverse wall, a front wall, a rear wall, a top wall, and a bottom wall, cooperatively defining an interior. A cable exit/entry is provided opening on one of the front wall, the rear wall, the top wall, and the bottom wall. A removable insect-infestation prevention device is located adjacent the cable exit/entry opening, the insect-infestation prevention device including cable openings communicating with the cable exit/entry opening. The cable openings of the device are sized to accommodate fiber optic cables exiting or entering the housing while limiting the amount of free space around the fiber optic cables to prevent insects from entering the housing.

Abstract: A female hardened fiber optic connector for terminating an end of a fiber optic cable that is suitable for making an optical connection with another hardened cable assembly and cable assemblies using the same are disclosed. The female hardened fiber optic connector includes a connector assembly, a crimp body, a connector sleeve, and female coupling housing. The connector sleeve has one or more orientation features that cooperate with one or more orientation features inside the female coupling housing. The crimp body has a first shell and a second shell for securing the connector assembly at a front end of the shells and a cable attachment region rearward of the front end for securing a cable.

Abstract: A furcation tube for an optical fiber cable comprising a plurality of channels for receiving a plurality of optical fiber strands that allows for the breakout of multiple fiber groups without the need for marking individual fibers. For example, a 24 fiber cable can be broken out into two, 12-fiber groups within the same furcation tube for connectorization. This improves the sortabilility of the optical fiber strands and eliminates the extra bulk of using multiple furcation tubes. The furcation tube includes strength members disposed therein for strain relief.

Abstract: A bend radius manager includes a base having a surface, and a plurality of discrete lobes with at least one arcuate section extending away from the base surface and terminating at a top surface, an outer surface defined between the base and the top surface, the plurality of lobes configured to receive at least one media having a minimum bend radius.

Abstract: A lashing assembly lashes together two or more fiber optic telecommunications cables. The lashing assembly comprises at least a first and a second bobbin. As the cables are passed through the first bobbin, twine pays off from the first bobbin and wraps around the cables in a clockwise helix. As the cables are passed through the second bobbin, twine pays off from the second bobbin and wraps around the cables in a counterclockwise helix. In this way, the twine from the first and second bobbins lash the cables together as the cables are passed through the first and second bobbins.

Abstract: An adapter includes a housing with opposed openings for receiving a first connector that is mechanically and optically mateable with a second connector to form one or more optical signal communication links. The housing is arranged with a slot for receiving a flexible material having an index of refraction that approximates the index of refraction of aligned pairs of optical fibers. The flexible material is appropriately sized to cover the fibers from each of the connectors. The optical fiber ends of a respective connector can be cleaned by inserting the connector in the adapter and advancing the flexible material. Once the optical fiber ends of both connectors have been cleaned and the flexible material further advanced, the connectors can be reinserted in the adapter to establish an optical signal link between the optical fibers.

Abstract: There is provided fiber drop terminal (“FDT”) assemblies for providing selective connections between optical fibers of distribution cables and optical fibers of drop cables, such as in multiple dwelling units. The FDT assemblies include a base and a cover that define a tongue and groove that selectively engage to seal the base and cover. The FDT assemblies also include a mounting plate for mounting of the base and cover, as well as a mounting plate extension for mounting of a skirt. The skirt provides slack storage for drop cables exiting the FDT. The components of the FDT assembly are selectively interlockable to prevent unauthorized access to the interior cavity of the base and cover and to the slack storage area of the skirt.

Abstract: An optical fiber cable connector including a first member and a second member. The first member has a channel for an optical fiber of an optical fiber cable, and an outer surface configured to have a strength member of the cable located thereon. The second member is configured to slide on top of the first member. The second member includes a barrel section configured to be compressed onto the first member and a gripping section made of a resiliently deformable material which is sized and shaped to pull the strength member along the outer surface of the first member as the second member is slid on top of the first member.

Abstract: An optical fiber cleaver (12) is disclosed having a first pivot arm (16) for securing a terminal end of an optical fiber (22), a second pivot arm (18) with a cutting tool (82) for scoring an outer surface of the optical fiber (22), and a flexible arm (24) extending outward from underneath the cutting tool (82). A V-shaped locating groove (28) extends in the flexible arm (24). A stress-relief recess (36) is located on the surface (26) of the flexible arm (24) in a location at which the cutting tool (82) scores the optical fiber (22). An arcuately-shaped recess (92) is formed into a lower surface (96) of the flexible arm (24) beneath the stress-relief recess (36) to focus the bend in the optical fiber (22) where the fiber (22) is scored and the cleave is to occur. A flexible arm stop (90) is provided to control the minimum radius of the bend in the flexible arm (24) and the minimum radius of bend induced in the optical fiber (22) at the cleave.

Abstract: An optical fiber adapter according to the present disclosure includes a main body, an inner housing and a cover plate. The main body has an accommodation room in an axial direction defined by a first wall, a second wall, a third wall and a fourth wall, wherein the first wall faces the third wall and connects with the second and fourth walls. An access opening is arranged on the first wall. The inner housing may be inserted into the accommodation room through the access opening on the first wall. Two protruding portions extend from the second and fourth walls, respectively. The cover plate is configured to cover the access opening on the first wall, wherein the cover plate has a plurality of hooking portions formed thereon for hooking on to the protruding portions, respectively.

Abstract: A fiber optic connector is provided comprising: a connector plug, which may be inserted into an associated socket in a longitudinal direction; a resilient leg, depending at a first end thereof from the first connector plug, and having a depressible part, distal therefrom, depressible towards the first connector plug; and a guard cover, configured to prevent access to the depressible part of the resilient leg in its direction of depression, but to permit access to the resilient leg in the longitudinal direction through an access aperture, the access aperture being aligned with the depressible part of the resilient leg on an axis parallel with the longitudinal direction, to allow depression of the resilient leg through the access aperture directly. A corresponding extraction tool and methods, loopback connector, blanking plug, blanking plate and patch panel are also provided.

Abstract: The NTU receiving structure (14) is further adapted to receive a demountable casing (15) for enclosing a second network termination unit (16). The fiber management unit (11) is further adapted for accommodating the outer end of a second optical fiber with a second optical connector (32). The fiber termination unit (10) further comprises a second NTU connection unit (23) for positioning the second optical connector (32) in a position suitable for connecting the second optical connector (32) to a connector part of the second network termination unit (16) when the demountable casing (15) with the second network termination unit (16) is received in the NTU receiving structure (14).

Abstract: A fiber optic enclosure includes a housing and a cable spool assembly disposed on an exterior surface of the housing. The cable spool assembly has a first tear-away end and a second tear-away end. The first and second tear-away ends include at least one area of weakness extending from an inner diameter of the cable spool assembly to an outer diameter of the cable spool assembly. A mounting plate is rotationally engaged with the cable spool assembly such that the cable spool assembly and the housing selectively and unitarily rotate about an axis of the mounting plate.

Abstract: An optical fiber adapter according to the present disclosure includes a main body and an elastic shutter member. The main body has an accommodation room defined by a first wall, a second wall, a third wall and a fourth wall, wherein the first wall faces the third wall and connects with the second and fourth walls. An indentation is formed outside the accommodation room and on the third wall. The shutter member includes a fixing portion positioned within the accommodation room and on the third wall, a shutter plate, a connecting portion connecting the fixing portion with the shutter plate, and a hooking portion extending from the connecting portion to hook on to the indentation on the third wall. The shutter plate extends from the connecting portion and into the accommodation room.

Abstract: A bracket for routing cables in a cable management system that has a mounting portion which is used to mount the bracket to the cable management system and is provided on a mounting end of the bracket. The bracket also has a holding portion that has a plurality of apertures which are to hold the cables. Each of the apertures are provided at a different distance from the mounting end of the bracket.

Abstract: A fiber optic closure includes optical adapters located within an enclosure, a ledge located within the enclosure between the optical adapters and a cable port, and a strain-relief bracket located within the enclosure at the ledge. The strain-relief bracket defines channels that align with channels defined in the ledge. Each of the channels of the strain-relief bracket is narrower than a fiber optic connector that is suitable to be plugged into one of the optical adapters. The strain-relief bracket provides support ledges between the channels that inhibit fiber optic connectors from being pulled out of the optical adapters.

Abstract: A fiber optic telecommunications frame is provided including panels having front and rear termination locations, the panels positioned on left and right sides of the frame. The frame includes vertical access for the rear cables. The frame further includes left and right vertical cable guides for the front patch cables. The frame further includes cable storage spools for the patch cables. The frame includes a horizontal passage linking the left and right panels and the cable guides. A portion of the frame defines splice tray holders and a central passage from the splice tray holders to the rear sides of the left and right panels. From a front of each panel, access to a rear of the panel is provided by the hinged panels. Alternatively, the panels can form connector modules with front termination locations and rear connection locations for connecting to the rear cables. The modules can house couplers, such as splitters, combiners, and wave division multiplexers.

Abstract: This application describes several embodiments of a duplex clip assembly for use in aiding the insertion and removal of a pair of LC fiber optic connectors. In one embodiment, the assembly includes a clip body with a hood. The clip body has a central wall, upper tabs and lower tabs configured to loosely retain a pair of LC connectors such as to allow the clip body to move axially relative to the LC connectors. The hood is configured to engage a camming surface on the LC connector latches when the clip body is moved axially rearward relative to the LC connector. In a second embodiment, the assembly includes a duplex housing and a housing cover. The duplex housing retains the LC connectors such as to allow them to rotate. The housing cover has a hood protruding from the top configured to engage a camming surface on the LC connector latches.

Abstract: A cable exit trough is mountable to a lateral trough section either during initial assembly of the cable routing system, or at a later date. The exit trough includes a bracket portion mountable to the top edge of one of the sides of the lateral trough section. Two lead-ins are provided to lead the cable in an upward direction from the lateral trough section to the exit trough. The exit trough includes an exit trough portion extending from the bracket portion upwardly away from the lateral trough section. The exit trough portion includes a convexly curved bottom trough surface, and two convexly curved upstanding sides. The exit trough portion and the lead-ins define a cable pathway from the lateral trough section to an exit point of the exit trough portion which can either lead downwardly relative to the lateral trough section, or horizontally.

Abstract: A fiber optic splice tray that has an increased fiber capacity and maximizes bend radius. The fiber optic splice tray has multiple manifolds that are stacked on top of each other to form manifold stacks. Also, the fiber optic splice tray has two sets of manifold stacks.

Abstract: A system is disclosed for maintaining the spacing between waveguides in an optical element of a near eye display. Spacing is maintained with spacer elements mounted between adjacent waveguides in the optical element.

Abstract: An optical fiber adapter security, an optical fiber connector security, and a removal tool for use therewith are introduced. The removal tool includes a first body and two second resilient arms. The first body has a first coupling unit. The first coupling unit matches the optical fiber connector security. The second resilient arms are connected to the first body and connected to second coupling units, respectively. The second resilient arms match the optical fiber connector security. The second resilient arms and the second coupling units together match the optical fiber adapter security. The optical fiber adapter security prevents improper use of the optical fiber adapter. The optical fiber connector security prevents inappropriate removal of the optical fiber connector set. Protection provided by the optical fiber adapter security and the optical fiber connector security can be disabled by the same removal tool.

Abstract: An optical module includes a wiring board on which a first opening and a second opening are provided having, between the first and second openings, a traversing portion on which a signal wire is arranged, an optical component that is mounted on a first plane side of the first opening and the second opening of the wiring board and that generates heat, a heat sink arranged on a second plane side, which is on a reverse of the first plane side, of the first opening and the second opening of the wiring board, and an anisotropic heat dissipation sheet that is provided between the traversing portion and the heat sink, and the optical component, and that has a thermal conductivity higher in second directions, which cross the traversing portion in a plane orthogonal to first directions, than in the first directions, which are thickness directions of the wiring board.

Abstract: An optical fibre package comprising an adhesive for coating optical fibers comprising part A and part B wherein Part A is an aqueous polymeric emulsion of 2-ethylhexylacrylate or butyl acrylate and acrylic acid or methacrylic acid and Part-B is polyvinylbutyral dissolved in isopropyl alcohol. The said system imparts stability to the optical fiber on long range exposure thereby improving performance.

Abstract: An optical fiber fusion splice system includes a working table and a storage box which stores the working table. The working table includes a fusion splicing machine installation portion accommodating a fusion splicing machine to be stored in the storage box and a working surface on which preparation work for an optical fiber is configured to be performed. The fusion splicing machine installation portion includes a fusion splicing machine restriction portion being configured to restrict the fusion splicing machine without the fusion splicing machine moving in a horizontal direction with respect to the working table. The working surface includes a protrusion provided on an outer circumference of the working surface, the protrusion being configured to prevent a tool used in the preparation work from falling from the working surface. The storage box includes a box main body and a cover which covers an upper portion of the box main body.

Abstract: A rack cabling system including a rack having mounted thereon a first hardware component and a patch panel housing mounted on the rack adjacent the first hardware component. The patch panel housing populates no more than a three rack unit (RU space), the patch panel housing including a first end having cable pathway openings and a second end having connector elements mounted therein. The patch panel may have a first cable pathway opening located adjacent the first side of the housing and defining a primary position and a first connector element mounted on the second end and the first connector element having a first position corresponding to the primary position of the first cable pathway opening. Cable harnesses are routed with less than three bends of the cables between the first hardware component and the patch panel housing, so that the first cable harness is terminated at the first connector element in the first position.

Abstract: A bladeless optical fiber cleaver includes a first clamp and a second clamp coupled to each other via a generally support tray, where the second clamp is movable with respect to the first clamp along an axis of the optical fiber. The first and second clamps each receive a portion of the optical fiber. The fiber cleaver includes a mechanism to create a tension force in a stripped portion of the optical fiber, where the stripped portion of the fiber under tension is exposed to receive contact from a flexible abrasive material, the flexible abrasive material introducing a flaw in the optical fiber where the cleave takes place.

Abstract: A fiber optic network has alarmed fiber optic lines in the cables connecting a secured junction box to plural user lock boxes. An outgoing alarm line and return alarm line in each cable connect the junction box to each user box. The outgoing alarm line is looped to the return alarm line inside the user lock box. The return alarm line is looped to the outgoing alarm line of a different cable inside the junction box to interconnect a plurality of alarm lines passing through a plurality of user boxes. A detector detects an alarm signal in the connected alarm lines to trigger an intrusion alarm. Power to the components in the box is disconnected when the box is opened and ventilation openings to the box are closed when the box is closed.

Abstract: An alignment pin for an optical communication system comprises: a first portion (31) extending along a direction in a receiving hole of a printed circuit board, a second portion (32) extending along this direction in a receiving through hole of an optical coupling device, a third portion (33) extending along this direction in a receiving hole of an external optical component. The pin comprises an abutting surface (35) placed in contact with a parallel complementary surface (36) of the optical coupling device.

Abstract: A cable breakout kit has a cable portion, an inner wall portion and a furcation portion with at least one fiber port. The cable portion and the furcation portion are dimensioned to couple with one another, enclosing a furcation area. The inner wall portion is coupled to the furcation portion and a fiber bundle of the cable, enclosing a fiber area within the furcation area; the fiber area is coupled to the at least one fiber port. An assembly including a cable with a fiber and an electrical conductor utilizes a transition housing to pass the fiber and conductor to respective furcation tubes, isolated from one another. The fiber area is isolated from the furcation area and the furcation portion.

Abstract: Advantageous breakout assemblies and associated mounting members for use in fiber optic applications are provided. More particularly, the present disclosure provides for improved fiber optic breakout assemblies and associated mounting members (e.g., mounting panels) that include mating features. The present disclosure provides for improved systems/designs for breakout assemblies and mounting members for use in fiber optic applications, and wherein the breakout assemblies and mounting members are cost-effective, efficient and/or user-friendly. Improved, convenient, low-cost and effective systems, assemblies and methods are provided for easily breaking/branching out one or more fiber optic cables/fibers from a bundle or harness containing a plurality of fiber optic cables/fibers by utilizing advantageous breakout assemblies and mounting members that include mating features, and related assemblies.

Abstract: An optical fiber fixing device includes a substrate, a first cover, a second cover, a first buffer, a second buffer, a first locking element, and a second locking element. The substrate includes a loading surface having a first receiving portion and a second receiving portion. The first receiving portion and the second receiving portion each define receiving grooves for receiving the optical fibers. The first cover and the second cover are rotatably connected to two opposite ends of the substrate. The first buffer is fixed to the first cover, and presses the optical fibers in the receiving grooves of the first receiving portion. The second buffer is fixed to the second cover, and presses the optical fibers in the receiving grooves of the second receiving portion. The first locking element locks the first cover and the substrate together. The second locking element locks the second cover and the substrate together.

Abstract: A fiber optic cable distribution box has an interface compartment for interfacing a first set of fibers when routed inside the compartment, with a second set of fibers associated with a fiber optic cable that is routed to the box. A drum region is disposed beneath the interface compartment. The drum region includes a cylindrical wall for supporting a fiber optic cable wound about the wall. The drum region is formed so that the box can turn about the axis of the cylindrical wall when a cable is paid out from the drum region. The interface compartment and the drum region are constructed so that the first set of fibers inside the interface compartment, originate from an inside end portion of the cable wound on the drum region.