Abstract: A transmission system in a downhole component comprises a data transmission element in both ends of the downhole component. Each data transmission element houses an electrically conducting coil in a MCEI circular trough. An electrical conductor connects both the transmission elements. The electrical conductor comprises at least three electrically conductive elements insulated from each other. In the preferred embodiment the electrical conductor comprises an electrically conducting outer shield, an electrically conducting inner shield and an electrical conducting core. In some embodiments of the present invention, the electrical conductor comprises an electrically insulating jacket. In other embodiments, the electrical conductor comprises a pair of twisted wires. In some embodiments, the electrical conductor comprises semi-conductive material.

Abstract: A cable connector type transceiver module is disclosed. Pads for wire soldering are disposed near a card edge connecting section of the tip of a printed circuit board on the printed circuit board. Pairs of wires of a cable for balanced transmission are extended in the direction of the card edge connecting section over a control IC package. Signal wires at the tips of insulation covered signal wires of the pairs of wires are soldered to the pads for wire soldering at the position near the card edge connecting section rather than near the control IC package.

Abstract: According to one embodiment of the invention, a system comprising a housing including an opening to receive an optical connector, and an electromagnetic inductive (EMI) shield independent of the optical connector to cover a portion of the opening to reduce emissions of EMI radiation generated by the optical connector from the transceiver housing. According to another embodiment of the invention, a method comprising connecting an optical connecter to an optical port of a housing in an optical module, the housing comprising an opening to receive to the optical connector; and shielding a portion of an opening in the housing to reduce emissions of EMI radiation generated by the optical connector from the housing.

Abstract: An assembly used to adapt an external post connector, such as a BNC type connector of a microsurgical optic fiber instrument to a threaded SMA type bushing of a light source includes an adapter that can be threaded on the bushing of the light source and is also connectable to the BNC connector.

Abstract: Various embodiments of a fiber optic module adapted for use in an electronic assembly and system are provided. Multiple embodiments of a method of interfacing an electronic assembly with an external circuit through use of the fiber optic module are also provided. In one embodiment, the fiber optic module includes a mounting bracket, a fiber optic connector, and an electrical cable connection. In one embodiment, the method includes: a) providing an electronic assembly comprising a bulkhead panel, a backplane, a fiber optic module, and an electrical cable, b) providing a fiber optic cable associated with the external circuit, and c) removably connecting the fiber optic cable a fiber optic connector of the fiber optic module at the front of the bulkhead panel.

Abstract: A wire-fixing device is provided for a fan including a casing having a wire groove defined in an outer side of the casing. The wire-fixing device includes a retaining groove and a substantially L-shaped resilient retaining member. The retaining groove is defined in an outer corner of the casing and adjacent to the wire groove. The retaining groove includes a first coupling groove and a second coupling groove respectively on two sides of the wire groove. The retaining member has an angle smaller than that of the outer corner of the casing. The retaining member includes two arms each having a distal end. A first coupling section and a second coupling section are respectively formed on the distal ends of the arms and extend inward toward each other. The first coupling section and the second coupling sections are respectively engaged in the first coupling groove and the second coupling groove.

Abstract: A chassis includes a plurality of slots to receive modules. The chassis includes an electrical backplane to couple to a module received in a first slot of the plurality of slots. The module to couple via a first communication interface on the module. An optical backplane is also included in the chassis. The optical backplane is to couple to the modules via a second communication interface on the module. The optical backplane is to couple to the second interface on the module via at least one interconnect through an opening in the electrical backplane. The interconnect configured to couple a fabric interface associated with the second communication interface to a communication channel routed over the optical backplane.

Abstract: An electric hand power tool has a housing, a drive motor, a power cord extending to an outside from the housing and supplying energy to the drive motor, wherein the power cord has an exit region with a cord sleeve that tubularly clasps the power cord and is provided with a structure for receiving a data storage medium.

Abstract: An optical connector has an optical-connector housing in which a ferrule at an extending end of an optical fiber is incorporated. The optical-connector housing is provided at opposite ends thereof with arm portions to abut against a housing of an electrical connector. Accordingly, the optical connector and the electrical connector are prevented from connecting to each other so that damage to the optical connector is reduced.

Abstract: A gravel pack completion with fluid loss control and fiber optic wet connect. In a described embodiment, a system for completing a subterranean well includes multiple assemblies installed in a wellbore. Each assembly has a fiber optic line. The fiber optic lines are operatively connected to each other after the assemblies are installed in the wellbore.

Abstract: A desk is adapted for connection to a second desk as part of a network of desks. The desk includes a desktop, a chassis positioned substantially beneath the desktop and including one or more cassettes, wherein at least one cassette includes one or more electronic components, a power distribution system providing power to at least one cassette and configured to provide power to at least one adjacent desk, and an electronic connection system providing an electronic connection from the one or more electronic components to an electronic component located in an adjacent second desk. The power distribution system and the electronic connection system are positioned substantially beneath the desktop and extend approximately from a first side of the desktop to a second side of the desktop.

Abstract: A holder of optical transmission lines encompasses an insulating base body defined by a mounting face to mount an optical device chip, an opposing face opposing to the mounting face and side faces which connect between the mounting face and the opposing face, one of side faces is assigned as an interconnection face, and provided with through-holes penetrating between the mounting face and the opposing face so as to hold optical transmission lines, the through-holes define openings on the mounting face; electric interconnections extending from respective vicinities of the opening on the mounting face on to the interconnection face; and heat conduction passages assigned alternately with the electric interconnections, extending from the mounting face on to the interconnection face, each of the heat conduction passages is longer than the electric interconnections on the interconnection face.

Abstract: To provide an electro-optical apparatus having a power-supply wiring structure that is capable of supplying a sufficient electrical power to a common electrode of electro-optical devices. An electro-optical apparatus according to the present invention comprises electro-optical devices having a laminated structure including first electrode layers formed on or above a viewing area 11 of a substrate 15 and a second electrode layer 14 formed on or above the first electrode layers, the laminated structure further including first power lines for supplying a voltage to the first electrode layers and second power wiring 16 electrically connected to the second electrode layer, wherein the first power lines and the second power lines are arranged on or above the viewing area and are arranged in the same layer as the first electrode layers or below the first electrode layers.

Abstract: A battery-powered tool includes a barrel and a handle connected to the barrel. A battery pack has a body and a pivotal tube extending from a top of the battery pack. The pivotal tube is inserted in a space defined axially in the handle so as to provide electric power to the tool. The pivotal tube can be pivoted between a first position and a second position relative to the handle. A limitation portion is located between the pivotal tube and an inner periphery of the space so as to limit a movement of the pivotal tube in the handle along an axial direction. An angle restriction portion is located between the pivotal tube and an inner periphery of the space so as to restrict the body to be rotated an angle less than 360 degrees between the first and second positions.

Abstract: An apparatus includes a housing, a first connection interface and an optical amplifier. The housing receives a fiber optic line and an electrical line. The first connection interface is located at least partially inside the housing and is exposed outside of the housing to couple the fiber optic line and the electrical line to a second connection interface. The optical amplifier is located inside the housing and is coupled to the fiber optic line. The optical amplifier receives power from the electrical line.

Abstract: An electrical floor access system (100) is provided so as to be accessible to the electrical equipment of an office system (50). The electrical system (100) includes a number of access floor modules (102) jpositioned beneath an access floor (30). The electrical system (100) also includes junciton block cables (104) and junction blocks (108) which can be connected the junction block cables (104). The junciton blocks (108) serve to provide electrical interconnection and mounting for electrical receptacles and similar devices for interconnection with electrical equipment. The access floor modules (102) are substantially interchangeable with each other, and the junction block cables (104) are substantially interchangeable with each other so as to provide an electrical system as a modular system adapted to be sized and configured in a manner which does not require any substantial number of different types and/or sizes of cables and other electrical equipment.

Abstract: An optical-electric connector (1) has an insulative housing (10), a plurality of contacts (21, 22, 23, 24, 25) received in the housing, and an optical-electric converter (30) assembled in the housing. The housing defines a receiving space (14) for receiving a mating plug and a plurality of passageways (16) for receiving the contacts. One of the resilient contacts forms an elastic contacting arm (212) extending into the receiving space and a retention section (211). A coil spring (214) is assembled between the retention section and the elastic contacting arm. The retention section of the contact securely holds the coil spring in its place.

Abstract: A communications system employing discrete multi-tone (“DMT”) modulated signals on a communications channel formed by inductively-coupled pipe. In one embodiment, the communications system includes a string of wired pipe joints that couple a transmitter to a receiver. Each pipe joint in the string possesses threaded ends configured for mechanically connecting with other pipe joints, a electrical or inductive coupler at each threaded end, and an insulated conductor that electrically connects the couplers. The transmitter and receiver communicate via DMT modulated signals transported by the wired pipe string. The system may further include multiple repeaters in the string. Each repeater may be configured to receive a DMT-modulated signal, to recover information from the DMT-modulated signal, and to re-transmit the information in the form of a DMT-modulated signal.

Abstract: An adapter may be for a multi-contact connector including at least one insert including at least two cavities. The adapter may include a first face configured to be pressed against a front face of the insert, and a second face opposite from the first face, a plurality of cells extending from the first face to the second face. The cells may include at least one cell of a first type configured to be placed in line with a first of the cavities of the insert and to receive an alignment sleeve configured to co-operate with a ferrule of an optical contact element when engaged in the first cavity, and at least one cell of a second type configured to be disposed in line with a second of the cavities so as to receive an end portion of a female electrical contact element when engaged in the second cavity.

Abstract: Provided is an example of an improved coupler element that provides both a fluidic connection for transporting cooling fluid into and/or out of, the target and a high capacity electrical conductor suitable for the transmitting electrical current to the target during operation of the accelerator. The improved coupler element includes fasteners, alignment structures and sealing structures that can be arranged on opposing faces of a two-part coupler such as a water connection block assembly used on an accelerator.

Abstract: A fiber optic gasket includes one or more apertures to individually retain optical fibers from one or more fiber optic cards positioned within an enclosure. A slit within the fiber optic gasket associated with each aperture facilitates placement of an optical fiber within an aperture. The fiber optic gasket includes a layer of conductive material for electromagnetic interference protection. When installed in the enclosure, the fiber optic gasket comes in contact with a door that is removably connected to the enclosure. An electro-magnetic interference shield is provided at the interface between the door and the fiber optic gasket. Optical fibers can extend out of the enclosure without causing harmful electromagnetic energy from leaving or entering the enclosure.

Abstract: The invention relates to an optical transceiver system for use in a host device including an optical transceiver receptacle or cage with a heat dissipating structure mounted thereon. The heat dissipating structure is electronically powered by an external source in the host device, which are electrically connected by insertion of a transceiver module into the transceiver receptacle. The present invention enables optical transceivers to support very high data rates, e.g. >8 Gb/s, while still supporting very high density applications, e.g. SFF/SFP. Actuating features on the transceiver module and cage enable the heat dissipating structure to be turned on when the transceiver module is fully inserted into the cage, and turned off when the transceiver module is removed or at least partially removed from the cage.

Abstract: A jack (1) connector comprises an insulating housing (10), a plurality of different contacts (21), (22), (23), (24), and an optical device (30). The insulative housing comprises a mating portion (11), a mounting portion (12), side portions (13), and a cavity space (14). The mating portion defines an opening (111) extending therethrough and communicating with the cavity space. The contacts are retained in the insulative housing, each contact having an upper end received in the cavity space and a tail end. The optical device is installed in the insulative housing and has an engaging portion for contacting an optical fiber plug connector, and a number of tail portions. A first distance between the engaging portion and the mating portion is longer than a second distance between the upper end of the contact and the mating portion.

Abstract: An optical communication apparatus is connected to the other communication apparatus by an optical fiber. The optical fiber cable comprises conducting wires. By interconnecting an output-side conducting circuit provided to the optical communication apparatus and an input-side conducting circuit provided to the other communication apparatus, a detection circuit is constituted. The optical communication apparatus comprises a monitor for monitoring a state of conduction of the detection circuit and an output control portion for controlling a laser diode. When the optical fiber cable is extracted from the optical communication apparatus, it is extracted from the other communication apparatus, and it is broken, the output-side and input-side conducting circuits are cut off. The monitor monitors a change in the state of conduction. If the monitor detects a change in the state of conduction, the output control portion stops emission of light from the laser diode.

Abstract: An optical-electric connector (1) has an insulative housing (10), a number of contacts (21, 22, 23, 24, 25) received in the housing, a spacer (15) and an optical-electric converter (30) assembled in the housing. The housing defines a receiving space (14) for receiving a mating plug and a plurality of passageways (16) for receiving the contacts. The spacer is installed in a rear side of the insulative housing for covering the receiving space. The spacer has a supporting body formed at an inner wall thereof for accommodating the optical-electric converter thereon.

Abstract: On a wiring board, an optical connection cable is provided in which a wiring light cord and a conducting wire are laid out in parallel. A primary side port and a secondary side port are optically connected for wiring, and are electrically connected to confirm the connection. When both ports are electrically connected, it is possible to confirm that the primary side port and the secondary side port are connected and a circuit is formed.

Abstract: An expandable, modular electronic equipment enclosure (8) for telecommunications, signaling, or other electronic equipment, wherein the enclosure (8) includes male and female expansion interfaces (20,22) that allow for expanding the enclosure (8) by adding substantially similar modules (110,210) whenever increased capacity is needed. Broadly, each module (10) includes a housing body (12); a lid (14); a base (16); the male and female expansion interfaces (20,22); and a cap (24). A single cable interface and pressurization control componentry (18) serves all of the modules (10,110,210) of the enclosure (8). To expand the enclosure (8), the male or female expansion interface (120,122) of a subsequent module (110) is interfaced or mated with the corresponding exposed, unmated female or male expansion interface (20,22) of a preceding module (10). The cap (24) seals and protects the exposed, unmated expansion interface (120,122) of the last or end module (110) of the enclosure (8).

Abstract: The invention relates to a latch device for a pluggable opto-electronic module, such as an optical transceiver, for locking the module in a rail or cage system of a host machine. The latest generation of optical transceivers include all metal housings, instead of all plastic or partial plastic, to ensure adequate heat dissipation. The relatively heavier housings necessitate the use of more robust latch devices. The latch device according to the present invention includes a sliding element with arms extending therefrom for pivoting a latching hook out of engagement with the rail or cage system. In a preferred embodiment, a pair of latching hooks are provided, one on each side of the module. The latching hooks are mounted on the ends of spring arms, which extend from the same sheet of spring metal positioned across the bottom of the housing.

Abstract: An electro-optic module with an optical coupling efficiency, the module comprising a receptacle assembly, wherein an end of the receptacle assembly is capable of receiving a light guiding element and wherein an opposite end of the receptacle assembly is capable of receiving an optical lens assembly positioned therein the receptacle assembly. An optoelectric package which includes an optoelectronic device is capable of being affixed to the opposite end of the receptacle assembly wherein an optical axis extends from the end to the opposite end of the receptacle assembly such that the light guiding element and the optoelectric device are in communication through a lens included in the optical lens assembly. The optical lens assembly is held fixedly in place against an inward periphery of the receptacle assembly such that a distance between the lens and the optoelectronic device can be adjusted to adjust the optical coupling efficiency.

Abstract: A connector for differential transmission is disclosed. The connector includes a connector housing, a connector main body attached thereto, and a photoelectric conversion module provided to the connector housing to be electrically connected to the connector main body. The connector main body includes a differential transmission electric connector part connectable to the connector of an apparatus. Ground contact members and signal contact pairs each including first and second signal contact members are arranged alternately in the connector main body. The photoelectric conversion module includes a photoelectric conversion part and an optical fiber cable connector part to which an optical fiber cable is connectable. The differential transmission electric connector part and the optical fiber cable connector part are provided to the opposite ends of the connector housing.

Abstract: The invention provides an electro-optical apparatus having a power-supply wiring structure that is capable of supplying a sufficient electrical power to a common electrode of electro-optical devices. An electro-optical apparatus according to the present invention includes electro-optical devices having a laminated structure including first electrode layers formed on or above a viewing area of a substrate and a second electrode layer formed on or above the first electrode layers. The laminated structure further includes first power lines to supply a voltage to the first electrode layers and second power wiring electrically connected to the second electrode layer. The first power lines and the second power lines are arranged on or above the viewing area and are arranged in the same layer as the first electrode layers or below the first electrode layers.

Abstract: A fiber optic connector for mounting to a cable having a plurality of optical fibers and connecting the optical fibers to mating optical fibers using termini. The connector comprises a housing defining an exterior and having a rear portion to which the cable is secured and through which the plurality of optical fibers enter. A support member having a shank which is engaged with a retainer ring and which is disposed within the housing extends between the rear portion of the housing and a forward portion of the housing with a gap disposed between the housing and the shank through which the optical fibers extend. A recess is disposed in the forward portion of the housing and has an interiorly disposed periphery which defines a recess profile. The recess profile has inner portions which receive the termini of the optical fibers.

Abstract: An electric connector for the motor of a hermatic compressor, comprising an electric insulating body seated against the stack of lamination (6) of the stator of the electric motor, and carrying a plurality of binding posts (22), which receive and affix respective wires from the coil windings (7) of said stator of the electric motor; contact terminals, eletrically connected to the binding posts (22), and which will be connected to the hermetic compressor, by respective conductors (30); and at least one fixation means (23), which is fitted and immobilized in a retaining bore (11) provided in the stack of lamination (6) of the stator.

Abstract: A media wall converter that fits into an existing faceplate of a wall outlet. The converter has a front section for housing converter circuitry and a rear section for housing optical components. The rear section of the adapter housing resides behind the faceplate while the front section of the housing extends into a work area from the faceplate.

Abstract: The invention concerns a contact device that comprises a carrier member (10), a receiving unit (12) for receiving at least one optical fibre (14), a control circuit (16) that includes a converter for converting optical signals to electrical signals and vice versa and a first contact member (18) connected to the control circuit (16) and designed such that a second contact member may be connected to the first contact member (18) for conducting electrical signals from and to the first contact member (18). The receiving unit (12), the control circuit (16) and the first contact member (18) are fixed relative to the carrier member (10). The contact device is designed to be fixable at a structural element (20) in a room (22) or other part (22) of a building. The invention also concerns a use of the contact device.

Abstract: A connector for a combination cable comprising at least one light guide and several electric lines has body, which can be introduced in the plugging direction into a socket and by means of which the connector can be held in the socket, a light guide holder having a light guide reception channel open at both sides and at least two contact elements in each case connectable to one of the electric lines.

Abstract: A connector for differential transmission is disclosed. The connector includes a connector housing, a connector main body attached thereto, and a photoelectric conversion module provided to the connector housing to be electrically connected to the connector main body. The connector main body includes a differential transmission electric connector part connectable to the connector of an apparatus. Ground contact members and signal contact pairs each including first and second signal contact members are arranged alternately in the connector main body. The photoelectric conversion module includes a photoelectric conversion part and an optical fiber cable connector part to which an optical fiber cable is connectable. The differential transmission electric connector part and the optical fiber cable connector part are provided to the opposite ends of the connector housing.

Abstract: A method for transmitting fiber channel signals and non-fiber channel signals. The method includes: providing a cable having a connector at each end thereof; and transmitting both the fiber-channel signals and the non-fiber channel signals through the cable between the connectors. In one embodiment of the invention, the non-fiber channel signals are transmitted in outer region of the cable and the fiber channel signals are transmitted in a region of the cable interior to the outer region.

Abstract: A lead for transmitting an electrical signal within a gas turbine engine, from a node at a first part of the gas turbine engine having a first surface to a second part of the gas turbine engine having a second surface, wherein the first part and the second part are coupled at a compressed joint, wherein the lead comprises: a node on the first surface of the first part; a first interconnect, adhered to the first surface of the first part; and a second interconnect, adhered to the second surface of the second part, wherein the first interconnect and the second interconnect abut at the compressed joint to provide, by their contact, a continuous electrical connection from the node to the second part.

Abstract: A subminiature coaxial connector (SMA) includes a shell, dielectric and conductor element that includes a biasing element that engages an interface contact tip and biases the interface contact tip into electrical contact against an electrical circuit, such as a trace on the circuit board without soldering, and adjusts for relative movements created by thermal mismatch.

Abstract: A hybrid connector for transmitting different types of electrical signals, or both electrical and optical signals, is disclosed. The hybrid connector includes a metallic extruded housing having a plurality of connector channels formed therein during extrusion. The connector also includes an intermediate printed circuit board (IPCB) having contact members fixed to the IPCB and that reside within respective connector channels. The contact members include contact pins for transmitting electrical signals and optical fibers for transmitting optical signals.

Abstract: An adaptor includes a body sized to fit into a cigarette lighter holder generally formed inside an automobile to form electrical connection with an electrical system of the automobile. The adaptor includes a casing having a front end to which a positive terminal is mounted and a side surface to which resilient negative terminals are mounted. The positive terminal has a sharp tip projecting out of the casing for helping a user to break a car window. A cutter having a sharp edge is movably attached to the side surface of the adaptor to help the user to cut off a safety belt by which the user is secured in a seat inside the car.

Abstract: A monitor apparatus including a monitor and a base to support the monitor. The monitor apparatus further includes a first link provided between the monitor and the base; a second link provided between the monitor and the base adjacent to the first link; a base bracket combined to the base having first and second lower supporting parts to rotatably support lower parts of the first and second links, respectively; a connecting bracket rotatably combined to the monitor having first and second upper supporters to rotatably support upper parts of the first and second links, respectively.

Abstract: A battery pack module (2), which can be inserted into a housing part (1) of a powered hand tool along a direction of insertion (A), having two latching hooks (5) with at least one leaf spring (4) and outwardly spring-biased, arranged on opposite sides of a module housing (3) and oriented transverse to the direction of insertion (A), which are connected to finger pressure surfaces (6) that can be moved from a resting position (I) into a released position (II). At least one leaf spring (4) is configured biconvex and forms a local force maximum (11) between the resting position (I) and the released position (II).

Abstract: An electrical connector assembly for a power tool, a power tool and methods for assembling a power tool. A one-piece trace or spider terminal member assembly provides points of connection for the motor components, such as the field windings, the brushes and the switch. To assemble the motor, the terminal member assembly is positioned in the motor housing. To mount the terminal member assembly, the terminal member assembly is preferably co-molded with the housing or, alternatively, may snap-fit into connectors formed on the housing. The terminal member assembly and the housing are then preferably punched or stamped at points to provide the necessary number of electrically separated contact elements to connect the components of the motor. For example, the female ends or terminals of the field windings, the brushes and the switch are connected to the electrically separated contact elements to provide a suitable complete electrical circuit for the motor.

Abstract: A package for opto-electrical components includes a casing having a chamber, and an optical feed-through between the chamber and the casing exterior. At least one board or tile adapted to carry opto-electrical components is in the chamber. The board or tile creates a solid mechanical structure with the casing while providing electrical ohmic connections with a set of electrical connections on the casing. The board or tile is from of an assortment of boards or tiles of different types.

Abstract: A retaining system including a power cord retaining system and a cord plug retaining system for use with a power tool. The power cord retaining system is configured for accommodating an extension cord and includes a cord capture formation for retaining the extension cord disposed on the tool, and a cord channel disposed on the tool and configured for supporting a loop of the cord substantially along an arc defined by the loop. In the preferred embodiment, the cord capture formation defines an enclosed aperture for retaining the cord at two points, and the cord channel defines a semi-circular arc for supporting the cord loop substantially along its apex. The plug retaining system is configured for maintaining electrical continuity between the plug and the receptacle and includes a contact portion for engaging a plug or a cord, and an attachment device for attaching the contact portion to the tool.

Abstract: An dual-purpose accessory for a line transmission device chassis preferably is disclosed. The accessory preferably includes a housing having a first portion and a second portion. The first portion preferably includes an electronic component contained therein that is in electrical communication with the line transmission device when the accessory is installed therein. The first and second portions are joined by a connection that enables the second portion to be detached from the first portion so that the accessory can be installed in two different types of chassis. One chassis type includes an opening in the chassis for insertion of the accessory, the other does not.

Abstract: To enable soldering with high efficiency, high temperature and short time or reflow soldering without using baking or moisture-proof packaging. An optical device which is placed at a side of distal end of plug inserted into a body is mounted on a surface of printed wiring board, and connected via the printed wiring board to a main substrate to which an optical connector is mounted. The printed wiring board is formed of the same material as a transparent resin package of the optical device. The printed wiring board is inserted into the body from the upper surface side opposite to the surface to which the optical connector is mounted, and fixed thereto. Alternatively, the printed wiring board is inserted into the body from the rear surface side opposite to the side at which the plug is inserted, and fixed thereto.

Abstract: A device, system, and method for managing slack in fiber optic cables that are connected from a fiber distribution shelf to a fiber termination shelf in a controlled environment vault are described. Individual fiber optic cables are bundled together and placed in a sheath. The ends of the individual fiber optic cables extend past the sheath and are staggered to correspond to ports in the fiber distribution shelf.