Abstract: Methods and systems for auxiliary cooling of electrical device housings are provided. In one embodiment, an electronics device enclosure system is provided. The system comprises a housing, wherein the housing encloses one or more electronic devices; a backplane situated within the housing wherein at least one of the one or more electronic devices are coupled to the backplane; and an auxiliary cooling system coupled to the backplane and adapted to receive electrical power from one or more power sources, wherein the auxiliary cooling system comprises one or both of a thermoelectric cooling module and a fan, and wherein the auxiliary cooling system is adapted to increase the heat transfer from the one or more electronic devices to an environment external to the housing.

Abstract: A splice tray arrangement including a tray and a splice chip. The splice chip includes a plurality of arms that define channels for holding splice elements. The arms include retaining structure for retaining a splice element in both of either one of an upper region and a lower region of a channel. The splice tray arrangement also includes a mounting arrangement for securing the splice chip to the tray at a mounting location. The mounting arrangement includes sliding interlock guides disposed on each of the splice chip and the tray. The mounting arrangement further includes flexible tabs arranged to prevent lateral movement of the splice chip when positioned at the mounting location.

Abstract: A distribution connection module (1) for telecommunications and data technology includes a housing (3) in which input and output contacts (4, 5) for the connection of cables or wires are arranged such that they are externally accessible. The housing (3) is designed with a cavity in which functional elements are arranged between the input and output contacts (4, 5).

Abstract: Variable error correction for a multipoint-to-point orthogonal frequency division multiplexing (OFDM) system are provided. In one embodiment, a system comprises: a host unit; a plurality of remote units using a multiple access scheme to communicate at the same time with the host unit using OFDM; wherein the host unit allocates orthogonal tones within the system to the plurality of remote units; wherein the host unit sends an adjustment signal to at least one of the remote units instructing the at least one remote unit to adjust the timing of transmissions from the at least one remote unit to improve orthogonality of an OFDM waveform received at the host unit; and wherein at least one of the remote units transmits an upstream OFDM signal to the host unit using variable error correction in which the remote unit applies at least one of a plurality of available levels of error correction.

Abstract: A wall mount chassis includes circuitry for telecommunications signals. The chassis includes a rear wall mountable to a vertical wall, and first and second sides. Each side includes a hinged cover. Each cover includes an access window for viewing an opposite side of the cover. On one side of the chassis is positioned signal converter cards for converting between optical and electrical signals. On an opposite side of the chassis are positioned one or more electrical power cards providing an access location for power to the circuitry. A CPU card can also be provided on the same side as the power card. An interior of the chassis includes a back plane positioned between the converter cards and the power and CPU cards wherein the back plane is perpendicular to the converter cards and power and CPU cards. A cable spool is positioned adjacent one of the sides for cable management. Cable clips are provided for securably retaining one or more cables adjacent each of the first and second sides.

Abstract: A fiber optic cable assembly with an optical fiber extending through first and second overlapping cable jackets. The first cable jacket is slidably received within a longitudinal opening of the second cable jacket. A first end of the optical fiber is fixed with respect to the first cable jacket and a second optical fiber is fixed with respect to the second cable jacket. The two cable jackets overlap and are slidably movable with respect to each other. A method forming a cable assembly.

Abstract: A strain relief device for a plug connector includes a base member, a latching member, and a closure member. The latching member is selectively received within the base member. The closure member is selectively received within the base member. The closure member is adapted to cooperate with the latching member to arrest a cable. The closure member is configured to apply an inward compression force to the latching member in response to a force applied to the closure member by the cable.

Abstract: Systems for adaptive modulation in multipoint-to-point communication using orthgonal frequency division multiplexing (OFDM) 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 OFDM; wherein the host unit sends an adjustment signal to at least one of the remote units 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; wherein the host unit allocates tones within the OFDM waveform to the plurality of remote units; wherein different modulation schemes are used on different tones within the OFDM waveform; and wherein the host unit allocates tones within the OFDM waveform based on at least one of type of data to be transmitted and error rate requirement.

Abstract: A method for an orthogonal frequency division multiplexing multipoint-to-point communications system is provided. The method includes establishing communication between a first remote unit of a plurality of remote units and a host unit, the plurality of remote units communicatively coupled to the host unit in a multipoint-to-point, multiple access configuration, transmitting up to a plurality of tones from the first remote unit, the up to a plurality of tones modulated with upstream information using orthogonal frequency division multiplexing, and receiving information from the host unit to adjust a carrier power for tones transmitted by the first of remote unit so that the tones are substantially orthogonal when received at the host unit.

Abstract: Systems for variable forward error correction in a multipoint to point orthogonal frequency division multiplexing system are provided. In one embodiment, bidirectional communication system comprises: a first remote unit for communicating with a host unit using orthogonal frequency division multiplexing, the host unit communicatively coupled to a plurality of remote units in a multipoint-to-point configuration; wherein the first remote unit is configured to transmit at least one of a plurality of tones, the at least one of a plurality of tones modulated with upstream information using orthogonal frequency division multiplexing; and wherein the first remote unit selects an error correction degree for a first tone of the at least one of a plurality of tones based on error correction information received from the host unit, and encodes upstream information transmitted on the first tone based on the error correction degree.

Abstract: A bidirectional communication system is provided. In one embodiment, a system comprises a plurality of remote units; a multipoint-to-point host unit communicatively coupled with a plurality of remote units in a multi-point to point configuration, the multipoint-to-point host unit including a multi-carrier modem configured to communicate with the plurality of remote units via an orthogonal frequency division multiplexing waveform; wherein the multipoint-to-point host unit is configured to estimate a round trip path delay correction associated with at least one of the plurality of remote units; and wherein the multipoint-to-point host unit is configured to adjust the round trip path delay associated with the at least one of the plurality of remote units.

Abstract: Systems and methods for orthogonal frequency division multiplexing multipoint-to-point communications systems are provided. In one embodiment, a method comprises: establishing communication between a first remote unit of a plurality of remote units and a host unit, the plurality of remote units communicatively coupled to the host unit in a multipoint-to-point configuration; receiving an address code assignment from the host unit, the address code to be used in communicating with the host unit, wherein the address code is unique among the plurality of remote units; and transmitting up to a plurality of tones from the first remote unit, the up to a plurality of tones modulated with upstream information using orthogonal frequency division multiplexing.

Abstract: A method is provided. The method includes sharing upstream bandwidth capacity among a plurality of remote units in a manner that permits at least two of the remote units to transmit to a host at any one time using the upstream bandwidth capacity, the upstream bandwidth capacity comprising a plurality of orthogonal tones generated using inverse fast Fourier transforms, and causing at least one remote unit to adjust the manner in which symbols are transmitted therefrom on at least one of the plurality of orthogonal tones in order to improve the alignment of symbols received at the host.

Abstract: Systems for multipoint-to-point communication using orthgonal frequency division multiplexing and identification codes 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 the host unit allocates orthogonal tones within the system to the plurality of remote units; wherein the host unit sends an adjustment signal to at least one of the remote units 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 associates an address code with each of the plurality of remote units for designating downstream signals to the remote units.

Abstract: The present invention relates to an electronic signal switching module with connectors on a first side for connecting with a variety of devices and sources and with jacks for receiving patch cords on a second side. The switching modules include two position switches in the circuitry connecting the jacks with the connectors which allow the module to be configured as a straight-through patching module, a fully normal module with paired jacks or a half normal module with paired jacks. One alternative of the invention utilizes card edge connectors on the first side. Another aspect of the invention involves a chassis for holding a plurality of switching modules adjacent to and electronically connected with a plurality of connecting modules. The switching modules may also include designation lenses adjacent to the jacks for holding indicia.

Abstract: A bidirectional communication system is provided. The system includes a first remote unit for communicating with a host unit using orthogonal frequency division multiplexing, the host unit communicatively coupled to a plurality of remote units in a multipoint-to-point, multiple access configuration. The first remote unit is configured to transmit up to a plurality of tones, the up to a plurality of tones modulated with upstream information using orthogonal frequency division multiplexing. The first remote unit is configured to receive information from the host unit to adjust a carrier power of tones transmitted by the first of remote unit, and to adjust the carrier power based on the received information from the host unit so that the tones are orthogonal when received at the host unit.

Abstract: A protective endcap for use with a triaxial cable connector. The endcap is sized to fit about a mating end of the triaxial connector. A pair of protective boots for use with coaxial cable connectors. Each protective boot includes an interior space for receiving a triaxial cable connector. Each interior space includes ridges for engaging grooves about the connector. Each boot includes a mating circumferential lip about a connector end. Each boot includes a tapered cable end with an opening for a cable from a connector to extend through from the interior space. A triaxial cable connector assembly including a connector, a protective boot and an endcap. The connector is positioned within an interior opening of the boot with ridges of an inner wall of the opening engaging grooves of the connector. A cable extending from the connector extends through a cable end of the boot. A mating end of the connector is adjacent a connector end of the boot.

Abstract: An optical fiber cable management panel includes drawer assemblies, each including a drawer slidable within a chassis. The drawer assemblies are secured together by a bracket that includes an interlock arrangement with the chassis. Such an interlock arrangement includes a non-threaded stud engaging a hole. Radius limiters may be part of the drawer assembly and include a cable entry aperture have a closed perimeter and a flared cable guide surface around most of, and preferably all of, the closed perimeter to allow for the entry of cables from all directions. A control mechanism controls movement of the radius limiter relative to the drawer assembly. The control mechanism includes a rotating member that has an axis of rotation transverse to the slidable motion of the radius limiter and normal to the radius limiter.

Abstract: A universal hybrid adapter includes a first housing part, a second housing part, and a sleeve. The first housing part has a receptacle end configured to receive a plug connector including a ferrule having a first diameter. The second housing part has a receptacle end configured to receive a plug connector including a ferrule having a second diameter different from the first diameter. A first end of the sleeve is configured to receive the ferrule having the first diameter and a second end of the sleeve is configured to receive the ferrule having the second diameter. The transition from the first end to the second end of the sleeve takes place at right angles.

Abstract: A bidirectional communication system is provided. The system includes a first remote unit for communicating with a host unit using orthogonal frequency division multiplexing, the host unit communicatively coupled to a plurality of remote units in a multipoint-to-point configuration. The first remote unit is configured to transmit up to a plurality of tones, the up to a plurality of tones modulated with upstream information using orthogonal frequency division multiplexing. The first remote unit is configured to receive information from the host unit to adjust a carrier frequency of tones transmitted by the first remote unit, and is configured to adjust the carrier frequency based on the received information from the host unit.