Abstract: A communication system includes primary and secondary interface cards. A switching circuit allows both of the interface cards to selectively communicate over a medium without inducing reflection. Further, an automatic detection system is provided to allow a management circuit to identify which interface card is coupled as the primary or secondary card.

Abstract: An electrical connector including a circuit board, a contact spring insert, and an insulation displacement terminal insert wherein the contact spring insert is positioned between the insulation displacement terminal insert and the circuit board. The insert assembly can be mounted to a jack housing to form a telecommunications jack for receiving telecommunications plugs.

Abstract: A frequency estimate of an incoming data input is generated and transmitted with network traffic to a receiver. At the receiver, the estimate is recovered, decoded, and is used to seed an algorithm for locking the data access rate of the receiver to the incoming data. Data is buffered in buffers at each end of the system, and data flow out of the buffers is managed depending upon data rate.

Abstract: A device apparatus and method are detailed that allow for improved bit error rate (BER) testing, configuration, and operation of a communication device and associated physical communication link, in particular on a HDSL communication device and link. The improved communication device apparatus and method additionally allow for the communication device to utilize an embedded BER tester (BERT) to run commonly utilized BER tests on high speed communication channels (downstream and upstream) associated with the communication device. The device apparatus and method also allow for a BER test to be configured and initiated remotely, with loopback at a remote device and masking of alarm states at the remote device or local device until the BER test is complete.

Abstract: An apparatus for dynamically controlling the delivery of data over a network is provided. The apparatus includes a network interface circuit with at least one communication port adapted to be coupled to a network. The apparatus further includes an encoder that is communicatively coupled to the network interface circuit. The encoder is adapted to receive data from a source and to encode the data with a selectable level of compression. The network interface circuit includes a control mechanism that provides a signal to select the level of compression for the encoder based on at least one parameter.

Abstract: An optical fiber cable management panel is provided with slideable drawers and structure within the drawers for cable management and/or connection to other devices. Tray inserts drop into the drawers to provide the appropriate management and connection devices. A movable take-up mechanism manages the cable entering and exiting the drawers at side openings. Stackable pivoting storage trays on the tray insert include a detent arrangement for holding each tray in a pivoted access position. The tray inserts further include a front key, and a back tab mounting arrangement for mounting the tray inserts to the drawers, and side radius limiters including notches for extending over raised portions of the drawer. The take-up mechanism includes a U-shaped trough section and cable retention tabs. A control mechanism is provided for controlling movement of the take-up mechanism relative to the drawer.

Abstract: An optical distribution node for an hybrid fiber/coax network is provided. The optical distribution node includes a laser transmitter coupleable to a fiber optic link that transmits upstream, digital data to a head end of the network. The node also includes a data concentrator coupled to provide the upstream, digital data to the laser. For at least one coaxial cable link of the network coupleable to the optical distribution node, the node also includes a frequency translator that receives the upstream, digital data modulated on a first carrier frequency and retransmits the upstream, digital data to the plurality of modems for collision detection. The node also includes a data interface coupled between the at least one coaxial cable link and the data concentrator that determines whether the upstream data is valid.

Abstract: Methods and systems of monitoring voltage input to network elements are provided. One method includes receiving an input voltage for a line-powered network element, applying the input voltage across a primary winding of a flyback power converter during an on-time of a primary switch, and transferring the input voltage from the primary winding to a secondary winding of the flyback power converter during an off-time of the primary switch. The method further includes sensing the voltage of the secondary winding during the on-time of the primary switch; and drawing minimal current from the flyback power converter.

Abstract: A cable management system (20) is provided including a rack (22) for holding telecommunications equipment (24), and a ribcage cable support member (60) along a vertical side of the rack. The ribcage cable support member includes a plurality of forwardly and rearwardly extending ribs (116, 118). The ribs each include cable retention tabs (124). A plurality of spools (70) are provided for cable storage on the ribcage cable support member. Holes (82) through the ribcage cable support member allow access between the front and rear portions. An additional rack may be positioned on an opposite side of the ribcage cable support member to the first rack, and two columns of ribs are provided. Resilient plastic edge protectors (150) maybe fitted onto the ribs (116, 118).

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: 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 fiber optic cable connection system comprising a first fiber optic connector including a ferrule within which an optical fiber is mounted and a fiber optic adapter for receiving the first fiber optic connector including a sleeve for receiving the ferrule. The first fiber optic connector is mounted within a first threaded body with the fiber optic cable extending through an opening in a distal end of the first threaded body and the ferrule accessible through a proximal end of the first threaded body. The fiber optic adapter is mounted within a second threaded body and the second threaded body adapted for mounting to a bulkhead. The second threaded body adapted to engage the proximal end of the first threaded body with the first connector engaging the adapter and the ferrule extending into the sleeve. An outer housing is threadably mounted about both the first and second threaded bodies when the second threaded body is engaging the proximal end of the first threaded body.

Abstract: A method of decoding a signal in an optical fiber. In one embodiment the method includes receiving the optical signal, wherein the optical signal is a pulse amplitude modulated signal. Converting the optical signal to an electrical signal. Comparing the electrical signal with a plurality of levels. Producing comparison output signals based on the comparison of the electrical signal with the plurality of levels. Processing the comparison output signals on a clock to produce processed output signals and latching the processed output signals on a clock signal to generate the plurality of serial, digital data streams.

Abstract: An open access signal distribution system in which a variety of wireless voice, data and other services and applications are supported. The open access system makes use of a distributed Radio Frequency (RF) distribution network and associated network entities that enable the system operator to employ a wireless infrastructure network that may be easily shared among multiple wireless service providers in a given community. The open access system provides the ability for such operators and service providers to share the infrastructure regardless of the specific RF air interface or other signal formatting and/or managing messaging formats that such operators choose to deploy.

Abstract: A fiber optic polishing apparatus including a support system, a polishing sub-assembly coupled to the support system including a plurality of pads, and a fixture to hold a plurality of fiber optic connectors. The fixture is positioned adjacent to the plurality of pads so that an end surface of each of the plurality of fiber optic connectors is held in contact with a corresponding pad. A drive mechanism is coupled to the support system to move the fixture to polish the end surface of each of the plurality of fiber optic connectors. Each of the plurality of pads may travel independently in a vertical direction. The polishing sub-assembly may further include a web polishing film, a fluid injection module configured to direct water onto the film, and a rinsing module to rub against a face of each of the plurality of fiber optic connectors to remove debris.

Abstract: A current sharing circuit provides redundant power supplies with current sharing through the use of multiple feedback loops and existing circuit diodes to generate shared load current within predefined load voltage regulation requirements. A method of sharing current allows adjustment of the feedback loops to accommodate characteristics of the circuit.

Abstract: A service delivery unit for an enterprise network is provided. The service delivery unit includes at least one network interface port that is coupleable to a wide area network and at least one data port that is coupleable to a plurality of local area networks. The service delivery unit also includes a policy server interface that is coupleable to a policy server. The policy service includes policies for bandwidth allocation stored on a computer readable medium. The service delivery unit further includes a central processing unit that is communicatively coupled to the network interface port, the data port and the policy server interface. The central processing unit executes instructions to selectively allocate bandwidth in the wide area network for users of the plurality of local area networks based on the policies stored in the policy server.

Abstract: A fiber optic connector including a ferrule surrounding an optical fiber and a hub engaging the ferrule. The hub includes a front portion having first and second opposing surfaces and first and second tapered regions extending from the first and second opposing surfaces to a front face. A housing includes an anti-rotation seat configured to engage the first and second opposing surfaces, the anti-rotation seat including parallel first and second contact lines positioned at a front of the anti-rotation seat. A spring within a chamber of the housing biases the ferrule through a bore in the front of the housing. The first tapered region of the hub engages the first contact line and the second tapered region engages the second contact line when the hub and ferrule are in a first rotational position so that the optical fiber is maintained at a known orientation with respect to the connector.

Abstract: A fiber optic telecommunications frame is provided including termination modules positioned on left and right sides of the frame. The frame further includes left and right vertical cable guides. The frame includes a horizontal passage linking the left and right panels and the cable guides. The termination modules hold fiber optic modules with front termination locations. The fiber optic modules can house couplers, such as splitters, combiners, and wave length division multiplexers. A retention mechanism retains each fiber optic module in a partially removed position from the termination module.

Abstract: A circuit assembly for monitoring port activity and integrity of a multiport media converter that is centrally located on a chassis. The circuit assembly indicates whether a fault condition exists for a selected port pair and also indicates activity and integrity of each port of the selected port pair.