Abstract: A cabinet is provided for managing the connections between a feeder cable and a distribution cable wherein the distribution cable is a blown optical fiber. The cabinet includes shelves for holding splices between the feeder cable and the distribution cable. The shelves also include microduct holders for holding each of the microducts associated with the distribution cable. The cabinet also includes splicing between the feeder cable and a fiber optic splitter. Preferably a fiber termination is provided between the splice and the splitter. The cabinet also includes termination panel between the splitter outputs and distribution pigtails. A connector storage area is also provided. The distribution pigtails are spliced on spliced trays to the blown fibers passed through the microducts.

Abstract: A system of terminating signals in a telecommunication system is disclosed. In one embodiment a line card comprises functional circuitry, line card connector contacts and a termination resistor. The functional circuitry is used to interface first type ports with second type ports. The line card connector contacts are adapted to be selectively coupled to a backplane of a chassis. The termination resistor is adapted to terminate signal lines when a jumper is coupled across select line card contacts.

Abstract: A keying system to control a mating interface between a plurality of mating jacks and plugs in a coaxial telecommunications panel.

Abstract: The present invention relates to cables made of twisted conductor pairs. More specifically, the present invention relates to twisted pair communication cables for high-speed data communications applications. A twisted pair including at least two conductors extends along a generally longitudinal axis, with an insulation surrounding each of the conductors. The conductors are twisted generally longitudinally along the axis. A cable includes at least two twisted pairs and a filler. At least two of the cables are positioned along generally parallel axes for at least a predefined distance. The cables are configured to efficiently and accurately propagate high-speed data signals by, among other functions, limiting at least a subset of the following: impedance deviations, signal attenuation, and alien crosstalk along the predefined distance.

Abstract: A fiber access terminal includes a drop cable side and a distribution cable side. The sides are separated by a frame to which a variety of cable management and cable connections components may be mounted. Optical fibers are routed from drop and distribution cables through a plurality of routing paths to splice trays for connection to other optical fibers. The terminal includes a base and a dome cover mounted to the base defining an enclosed interior. Passageways between the base and the dome cover are closed by removable covers to limit moisture and animals from accessing an interior of the dome cover. A tether connects the removable covers to the frame. The removable covers include one or more break out regions configured for being removed to receive one or more cables.

Abstract: Systems and methods for contention based tones in a multipoint-to-point orthogonal frequency division multiplexing system are provided. In one embodiment, a multipoint-to-point, orthogonal frequency division multiplexed (OFDM) communication system comprises: a host unit; a plurality of remote units that access the host unit using an orthogonal frequency division multiple access scheme; wherein each of the remote units modulates upstream information into an OFDM signal modulated using a Fourier transform; wherein the host unit receives upstream OFDM signals from a plurality of the remote units, wherein portions of the upstream OFDM signals arrive at the host unit at the same time; wherein a first remote unit transmits a first upstream signal to the host unit on a first orthogonal tone; and wherein the first remote unit retransmits the first upstream signal to the host unit in the event a collision occurs on the first orthogonal tone.

Abstract: Systems and methods for orderwire modulation in a multipoint-to-point orthogonal frequency division multiplexed (OFDM) system are provided. In one embodiment, a system comprises: a host; a plurality of remotes using an orthogonal frequency division multiple access scheme to communicate at the same time with the host; wherein the host sends a timing adjustment signal to at least one of the remotes instructing the at least one remote to adjust the timing of transmissions from the at least one remote to improve orthogonality of a combined orthogonal frequency division multiplexed (OFDM) waveform received at the host; wherein a first remote transmits a first upstream signal to the host on a first orthogonal tone; and wherein the host demodulates payload data from at least one orthogonal tone based on a first modulation scheme, and demodulates control data from at least one orthogonal tone based on a second modulation scheme.

Abstract: A program product comprising program instructions, embodied on a storage medium that are operable to cause a processor to switch input data packets for ingress to at least one internal-device port of an internal device from all external ports using virtual local area network identifiers and port virtual local area network tags and to switch output data packets for egress from the internal-device ports of the internal device using the virtual local area network identifiers and the port virtual local area network tags. There are more external ports than internal-device ports and applications in the internal device have visibility to all external ports.

Abstract: The present disclosure relates to a jack assembly including a jack mount having a front side and a rear side. A jack of the assembly is adapted to be slidably mounted in a jack receiving region of the jack mount. The jack assembly also includes a plurality of cross-connect contacts, and a rear interface assembly. The rear interface assembly includes a dielectric cover piece and a plurality of rear connectors that project outward from the dielectric cover piece.

Abstract: A telecommunications optical fiber distribution system is disclosed. The system comprises a support structure with an upper end, a lower end, a front side, a rear side, and a longitudinal axis. An input cable carrying an input signal and an output cable carrying an output signal is received into the system through the lower end. A plurality of signal splitters located at the upper end of the support structure split the input signal into a plurality of secondary signals. The system includes a plurality of adapters arranged radially about the longitudinal axis along the front side of the support structure. The adapters connect the secondary signals to the output signal. A cable management structure having portions located both along the front side between the plurality of adapters and the splitters and adjacent the back side manage and direct cables going from the input opening to the splitters and from the splitters to the adapters.

Abstract: Systems and methods for covering a trough member. A system can include a hinge clip coupled to a sidewall of the trough member and having arms creating a socket. The system can include a cover including a pivot member and a groove at one end. The pivot member can be received in the socket to allow the cover to pivot about the pivot member from open to closed positions, and one arm of the socket can be received in the groove in the open position. A capture clip including a ramp portion and a seat can be coupled to the other sidewall, and another pivot member at the other end of the cover can ride along the ramp and drop into the seat as the cover is pivoted from open to closed positions. The cover can also be two cover portions, each extending partially over the trough member and creating a slot therebetween. The hinge clip can include structures to limit rotation of the cover, and structures to capture portions of the cover.

Abstract: Systems and methods for scanning by remotes in multipoint-to-point communication using orthogonal frequency division multiplexing are provided. In one embodiment, a system comprises a host unit; and a plurality of remote units using a multiple access scheme to communicate at the same time with the host unit using orthogonal frequency division multiplexing (OFDM); wherein at least one remote unit scans a band of frequencies for a downstream signal from the host unit; wherein the host unit sends an adjustment signal to the at least one remote unit instructing the at least one remote unit to adjust the timing of transmissions from the remote unit to improve orthogonality of an OFDM waveform received at the host unit; and wherein the host unit allocates orthogonal tones within the OFDM waveform to the plurality of remote units.

Abstract: Systems and methods for ranging and round trip delay adjustment in a multipoint-to-point orthogonal frequency division multiplexing (OFDM) system are provided. In one embodiment, a multipoint-to-point, OFDM communication system comprises: a host units; a plurality of remote units that access the host using an orthogonal frequency division multiple access scheme; wherein each of the remote units modulates upstream information into an OFDM signal modulated using an inverse Fourier transform; wherein the host receives upstream OFDM signals from a plurality of the remote units, wherein portions of the upstream OFDM signals arrive at the host at the same time; wherein the host detects a round trip delay between the host and each remote unit; and wherein the host transmits at least one timing adjustment signal to at least one of the remote units based at least in part on at least one of the detected round trip delays.

Abstract: A housing including a plurality of openings for receiving fiber optic connectors and protecting the polished end face of the connectors from damage while the connectors are stored within a telecommunications connection cabinet. A module with a plurality of optical fiber cables connected to a first optical fiber cable and terminated by a fiber optic connector. Each of the connectors are inserted within openings in a connector holder for storage and protection until the cables need to be connected to a customer equipment cable.

Abstract: A bidirectional communication system is provided. In one embodiment, a system comprises a host; and a plurality of remote units, wherein a plurality of tones is shared among the plurality of remote units in order to communicate with the host using orthogonal frequency division multiplexing, wherein the plurality of tones is shared in a manner that permits at least two of the remote units to transmit to the host at any one time using the plurality of tones. The host causes at least one remote unit to adjust a timing of symbols transmitted on at least one of the plurality of orthogonal tones in order to improve an alignment of multiframes received at the host.

Abstract: A chassis and associated telecommunication circuit card are disclosed. The chassis has heat dissipation and flame containment features while accommodating a high density of the circuitry cards. Embodiments include an inner housing with a double-layer middle floor dividing the chassis into top and bottom chambers. Each layer has partially aligned slots, and an air gap is provided between the two layers. Embodiments also include a double-layer mesh cover with an air gap existing between the two mesh layers. Projections and grooves are provided on the inner surfaces of the inner housing to receive circuit cards having a guide on one edge and a fin on another. The circuit card includes conductor structures such as multiple board layers with paired and segregated conductors. The circuit card also includes some components positioned to cooperate with the ventilation features of the chassis and includes some components chosen for low-power consumption or reduced flammability.

Abstract: A housing including a plurality of openings for receiving fiber optic connectors and protecting the polished end face of the connectors from damage while the connectors are stored within a telecommunications connection cabinet. A module with a plurality of optical fiber cables connected to a first optical fiber cable and terminated by a fiber optic connector. Each of the connectors are inserted within openings in a connector holder for storage and protection until the cables need to be connected to a customer equipment cable.

Abstract: The present invention relates to a fiber optic connector holder sized to fit within an opening for mounting a fiber optic adapter. The fiber optic connector holder is configured to permit a fiber optic connector with a dust cap positioned about a ferrule and a polished end face of an optical fiber held by the ferrule to be inserted within and releasably held by the connector holder. The present invention further relates to a system for holding fiber optic connectors including a fiber optic connector holder mounted within an opening in a bulkhead for mounting a fiber optic adapter. The fiber optic connector holder is configured to receive a fiber optic connector with a dust cap mounted about a ferrule and polished end face of an optical fiber held by the ferrule. The present invention also relates to a method of holding an optical fiber connector to a bulkhead, when the fiber optic connector includes a dust cap mounted about a ferrule and a polished end face of an optical fiber held by the ferrule.

Abstract: A module for radio frequency signal circuits includes an electrically conductive housing. Coax connectors are secured to the rear face of the housing. A circuit board is contained within the interior spaced between sidewalls of the housing. A ground side of the circuit board includes a layer of electrically conductive material which is electrically connected to the housing. Coax cables extend within the interior of the housing from the coax connectors and between the ground side of the circuit board and an opposing sidewall. An opposite side of the circuit board contains circuit components interconnected with one another through a plurality of circuit paths.

Abstract: An equalization circuit is provided. The equalization circuit includes an input adapted to receive signals from a communications channel. The equalization circuit further includes a plurality of equalizer circuits coupled to the input and operable to generate a plurality of intermediate signals. A selector circuit is also included. The selector circuit is responsive to the plurality of equalizer circuits and selects one of the intermediate signals. The equalization circuit also includes an output coupled to the selector circuit that receives the selected intermediate signal.