Abstract: An interferometer uses birefringent elements for splitting and combining beams of orthogonal polarization, and for changing the relative phase between the orthogonally polarized beams. A polarization sensitive detector is used to detect a fringe pattern whose periodicity is dependent on the relative optical paths traversed by the orthogonally polarized beams. In an embodiment of the invention, a birefringent beam splitter has an input path and first and second output paths. A birefringent beam combiner has first and second input paths and an output path, the first and second input paths of the birefringent beam combiner aligned respectively with the first and second output paths of the birefringent beam splitter. A polarization sensitive detector is disposed on the output path of the birefringent beam combiner to detect the periodicity of the fringe pattern.

Abstract: A method for confining circuit cards to different locations within a housing is provided. The housing includes a frame having an array of slots, each containing one of the circuit cards. In one embodiment, the receptacle has a cam that is selectively engageable with the frame for clamping the circuit cards within the frame. In another embodiment, a shaft is rotatably attached to the receptacle. The shaft has a head at one end and a nut opposite the head. A resilient element is disposed on the shaft between the head and the nut. The resilient element is axially compressible between the head and nut to bulge generally perpendicularly to the axial direction into engagement with the frame for clamping the circuit cards within the frame.

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 remote assembly is provided. The remote assembly includes multiple line powered remote units, an input power sharing circuit adapted to receive power from each of the multiple line powered remote units and provide a variable output voltage to power auxiliary equipment and a control circuit coupled to the input power sharing circuit, wherein the control circuit is adapted to control the variable output voltage.

Abstract: An angled mounting plate is provided for mounting a connector at a bulkhead in an angled manner, such as for a coaxial or triaxial connector system. The angled mounting plate mounts to a yoke mounted around the connector. The yoke includes identical mounting halves held in place by fasteners. The yoke is held to the mounting plate by further fasteners. Vertical mounting plates can also be provided for mounting to the connectors. The bulkhead can be provided with mounting structure for mounting directly to the yokes.

Abstract: A cable trough cover assembly and method of assembly including a cover plate and a hinge piece. The cover plate includes a pivot member along at least one edge, and the hinge piece defines a pocket for releasably receiving the pivot member. The pocket and pivot member arrangement allow the cover plate to be rotated relative to a cable trough to which the hinge pieces may be mounted.

Abstract: A method of automatic permanent virtual circuit connection activation is provided. The method includes detects initiation of communication between a first and a second network element at a first reference point. The method further receives at least one virtual circuit identifier of the first network element and learning at least one virtual circuit identifier of the second network element. In addition, the method creates a translation connection between the first and second network elements.

Abstract: A cable exit trough defining an insert aperture for receiving a modular cable management inserts. The modular insert providing an additional cable management device such as a curved guidewall. The cable management device may alternatively be fixed to the cable exit trough. Removable snap-mounted flanges may also be included in the exit trough. The exit trough may also include an exit cover having a cover plate and a pivot plate hingedly mounted thereto for easy access to the trough.

Abstract: The present disclosure relates to a device for holding a plurality of fiber optic connectors. The device includes a clamp defining a plurality of ferrule receiving openings, a set plate with openings for the fibers, an alignment surface on which the ferrules rest, and an actuator for moving moveable portions of the clamp. The clamp has a plurality of moveable portions that at least partially define the ferrule receiving openings. The moveable portions are moveable between a rest, biased closed position in which the ferrules are clamped within the ferrule receiving openings, and an open position in which ferrules can be inserted in the ferrule receiving openings.

Abstract: A finger guard for an electrical circuit breaker includes a rear plate with an opening, a guard portion extending from the plate adjacent the opening, and a removable portion, or knock-out, positioned within the opening. A further finger guard for an electrical circuit breaker includes a rear plate with an opening, a guard portion extending from the plate adjacent the opening, and opposing ramped finger grips on the outer walls of the guard portion. A further finger guard for an electrical circuit breaker includes a rear plate with an opening, and a guard portion extending from the plate adjacent the opening, the plate further including a designation holder. An electrical power distribution system with a chassis having an electrical circuit including a mount for an electrical circuit breaker and an opening providing access to the mount, includes a finger guard mounted across the opening.

Abstract: A circuit that uses a bi-directional buffer as follows: First a tri-state output buffer is connected to a functional clock and a bi-directional port is connected to a test clock. The bi-directional buffer is configured to receive control signals to selectively block and unblock the tri-state output port connected to the functional clock. In addition, the bi-directional port connected to a test clock is connected to the internal logic of the device. When the tri-state output buffer connected to the functional clock is blocked, the test clock transmits a clock signal to the internal logic of the device. When the tri-state output buffer connected to the functional clock is unblocked, the functional clock transmits a clock signal to the internal logic of the device.

Abstract: A module for containing a circuit is provided that attenuates emitted signals without the use of a cover. The module includes a housing and a receptacle. The housing has a front having a certain thickness and the receptacle is accessible from the front of the housing. The receptacle is shaped to receive a circuit component and forms a waveguide.

Abstract: A cable clip includes a housing defining an open space and outer grooves about the housing for mounting the cable clip into a mounting opening, the inner edge of the housing including trumpet flares around the edges of the ends and side to provide bend radius protection for cables passing through the clip and a gate closing off the open sided space. The gate may be attached to the housing by a living hinge.

Abstract: This communicator makes it possible for the user to do telephone, facsimile, and data communication at any location. On a pen input device, a space eye 2, a telephone control system, a facsimile control system, and a data transmission system are mounted. All of them are operated by an input pen 55 or the space eye 2. The pen input device is connected to a wireless telephone equipment 7, and can be connected to a desired party through the public communication channel. In order to make the most of the equipment of a GPS user, the GPS user device 8 is connected to the pen input device 3. The current location of the GPS user is found through the GPS user device 8, and the data on the current location is transmitted to the party. Further, to make this communicator usable in any country, it is provided with means to connect it to a wireless telephone network of an individual service area of the country.

Abstract: An electrical connector includes a connector housing (2) and a printed circuit board (3) with two sets of contact elements (7, 8). The first set of contact elements (7) is located on the front face of the printed circuit board (3) and protrudes into an opening in the plug connector housing (2). The second set of contact elements (8) is located on the rear face of the printed circuit board (3). The contact elements of the second set (8) are configured to form insulation-displacement contacts (8). The plug connector (1) also includes a cable manager (5) which has a continuous opening (13) and is configured on the front face (16) with guides (19) for cores or wires which are intended to make contact with the insulation-displacement contacts (8). The guides (19) in the region of the insulation-displacement contacts (8) are configured with recessed receiving elements or holders (20) for the insulation-displacement contacts (8), and the cable manager (5) can be latched to the plug connector housing (2).

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: An assembly for managing cables in a telecommunications installation where the cable management troughs directing cables from telecommunications equipment mounted to an equipment rack to a vertical cable way allow air flow into a ventilation space located between the equipment rack and the vertical cable way. A cable management trough with front and rear walls and a floor, wherein the floor increases in width from a first end to a second end and the front and rear walls decreases in height from the first end to the second end. A releasable hinge for mounting a door to a telecommunications rack and a slide movable between a captive and a retracted position. Placing the slide in the captive position prevents the door from being lifted from the hinge and placing the slide in a retracted position permits the door to be removed from the rack.

Abstract: A method for controlling the data rate of a virtual connection. Data packets are received for transmission on the virtual connection. The method comprises buffering the data packets in a buffer. A counter signal is generated to indicate the beginning of timeslots in a measurement window. The number of timeslots needed to transmit the data packets with a selected data rate is determined. The method further accesses data from at least one table to determine the spacing between timeslots in the measurement window used to request access to a data bus based on the number of timeslots needed to achieve the selected data rate. Further, access to a data bus for the data packets in the buffer is requested based on the data accessed from the table. The method further transmits the packets when access to the bus is granted.

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 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.