Abstract: A method and apparatus for generating a stable high frequency clock from a low frequency reference signal performs most of its operations in a digital environment. The method and apparatus reduce complexity and cost by reducing the number of digital to analog and analog to digital conversions and eliminating synchronous counters.

Abstract: Couplers for a cable trough system including a terminal end sized to receive a terminal end of a trough member along a longitudinal direction of the body. A spring may be coupled to the body for securing the terminal end of the trough member to the coupler, the spring including first and second spring arms extending generally in opposition to one another in a plane generally parallel to the longitudinal direction. The spring may be received in a slot formed by the trough member. Also included may be a spring release mechanism coupled to the body, the spring release mechanism sliding in the longitudinal direction between a locked position, such that the first and second spring arms engage the terminal end of the trough, and an unlocked position, such that the first and second fingers release the first and second arms of the spring.

Abstract: A method for recovering a reference clock from a composite clock signal is provided. The method includes receiving the composite clock signal. First and second intermediate clock signals are generated from the composite clock signal. The first and second intermediate clock signals are combined to recover the reference clock signal.

Abstract: A jack module sized to occupy only a portion of a telecommunications chassis. The jack module includes a front jack mount, a plurality of jacks and a rear connector mount. The rear connector mount supports a plurality of connectors. The connectors include housings defining ports for receiving plugs. In certain embodiments, the connectors can include RJ-45 connectors.

Abstract: A telecommunications device including a chassis having a card housing for containing a plurality of splitter cards. The housing includes front and back ends. The front end defines an access opening for allowing the splitter cards to be inserted into or removed from the card housing. The device also includes a plurality of card edge connectors for providing electrical connections with the splitter cards. The card edge connectors are located within the card housing adjacent to the back end of the housing. The device further includes LINE, POTS and DATA connectors electrically connected to the card edge connectors. Guide members are located adjacent the back end of the housing for directing the splitter cards into the card edge connectors as the splitter cards are inserted into the card housing. The guide members include ramps aligned at oblique angles relative to a direction of insertion of the splitter cards.

Abstract: An apparatus for containing objects, such as electronic circuit cards, and a method for making the same, the apparatus having a housing; at least one case disposed within the housing, the case adapted to confine the objects to different locations within the housing and comprising a frame, the region within the frame divided into two regions by a first partition, each of the two regions divided into a plurality of sections by a plurality of second partitions, each of the second partitions thermally coupled to the frame and the first partition, each of the sections divided into a plurality of slots, each slot having an object disposed therein for thermal contact between the first partition, a second partition, and one of a second partition and the frame; and at least one heat sink adapted to absorb heat from the case, the heat sink thermally coupled to the case and the housing.

Abstract: Methods for monitoring a plurality of electronic circuit cards of an electronic system are provided. An embodiment of the method includes collecting a plurality of messages at one of the plurality of electronic circuit cards. The plurality of messages includes a message from one or more of the plurality of electronic circuit cards. Transmitting the plurality of messages from the one of the plurality of electronic circuit cards to a monitor located externally to the electronic system is also included in the method. The method further includes selectively filtering the plurality of messages at the monitor, whereby producing a plurality of filtered messages.

Abstract: A monitoring circuit is provided. The monitoring circuit includes a bus interface that is adapted to be coupled to a bus for monitoring signals on the bus. The monitoring circuit also includes a programmable data capture circuit, coupled to the bus interface, that is adapted to be programmed to selectively capture data from the bus interface based on at least one criteria. The monitoring circuit further includes a memory, coupled to the programmable data capture circuit, that stores data provided by the programmable data capture circuit. A user interface is also coupled to the programmable data capture circuit. The user interface provides access to the programmable data capture circuit for programming the at least one criteria for capturing data. A controller is coupled to the user interface and the programmable data capture circuit to control the programming and operation of the programmable data capture circuit.

Abstract: An optical device has a first collimator sub-assembly having a first free-space end, and a second collimator sub-assembly having a second free-space end opposing the first free-space end of the first collimator. A central housing has first and second ends and is disposed between the first and second collimator sub-assemblies. A first ring on the first collimator sub-assembly is mounted to the first end of the central housing and a second ring on the second collimator sub-assembly is mounted to the second end of the central housing.

Abstract: An optical communications control station includes an equipment rack and a fiber frame for interfacing between the fiber communications link and the equipment in the rack. Raman pump lasers in the equipment rack produce a Raman pump output that bypasses the fiber frame and is coupled directly into the fiber communications link. The number of connectorized components that the pump light passes through is reduced, thus reducing the possibility of damaging fiber connections by passing the high power Raman pump light through fiber connections. The approach also reduces the possibility of an operator being inadvertently exposed to the high power Raman pump light, thus increasing operator safety.

Abstract: A cable storage assembly for storing an excess length of cable. The assembly includes a cable spool, spool holder, and holder mount. The cable spool has two flange members coupled by a center post, together forming an exposed cable storage chamber. A first flange member includes radius limiting elements and a transition opening. The spool receives a curved support arm of the spool holder into the cable storage chamber. The spool is removably retained on the spool holder by means of retaining grooves and retaining lips in the flanges and on the support arm. The center post of the spool may be characterized by two different radii of curvature. The spool holder is pivotally mounted in the holder mount. The holder mounts define a plurality of mounting locations which allow for a staggered stack of spools and spool holders. The spool holders and holder mounts may also include detent tabs and notches.

Abstract: A fan module having a frame is provided. A fan is disposed within and attached to the frame so as to align with an aperture passing through the frame. A baffle having first and second inclined surfaces in opposition is disposed within the frame. The first surface is for changing the direction of a first fluid flow from the fan, and the second surface is for changing the direction of a second fluid flow so as to direct the second fluid flow through an exit of the fan module.

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 high density patching system. The system includes a card housing having a front end positioned opposite from a rear end. The card housing includes top and bottom walls extending between the front and rear ends. The top and bottom walls define opposing sets of top and bottom slots. The patching system also includes a plurality of patch cords including patch plugs each having a width W1 and a height H1. The patching system further includes a plurality of jack access cards adapted to be mounted in the card housing, and a rear interface module positioned at the rear end of the card housing. The jack access cards include circuit boards having top and bottom edges adapted to fit within the sets of top and bottom slots defined by the card housing. The jack access cards also include a plurality of card edge contacts positioned at a rear of each circuit board.

Abstract: A management system and method are provided to adjust fans used for cooling equipment. The system includes one or more electric fans. The operational speed of the fan(s) is adjusted as the environmental parameters change. For example, the fan speed is increased as the temperature and elevation increase. In addition, fan failure circuitry provides a safe operation feature that increases fan supply voltage when a performance failure is detected.

Abstract: A fiber optic switch package and method of assembling the same with improved protection of the fibers and simple assembly. A fiber support device has passages that receive optic fibers and help align those fibers with respect to an optic switch component. In addition, the fibers that extend into the interior of the fiber support device are isolated from strains that may occur on the fibers that extend external to the fiber support device.

Abstract: The invention relates to a method of manufacturing an inner conductor of a resonator, and an inner conductor of a resonator comprising a first end and a second end, which is free. The inner conductor is deep-drawn from a uniform, electrically conductive blank.

Abstract: The present invention relates to a method and apparatus for testing components in ATM networks utilizing loop-back based ATM layer testing. The method and apparatus utilize interfaces and identifier codes to send and loop-back test cells along portions of virtual channels to test the virtual channels.

Abstract: A mount apparatus includes a separate spring contact and wire wrap pin assembly as well as having a sandwich construction to prevent the spring contact and wire wrap pin from being pushed out of their retention positions. In one embodiment, a mount apparatus includes a front cover having a plurality of receptacles, a back cover having a plurality of through holes, and a circuit board assembly sandwiched between the front cover and the back cover. The circuit board assembly includes a board having a plurality of through holes aligned with the receptacles of the front cover and the through holes of the back cover, a plurality of contacts retained in a first set of the through holes of the board of the circuit board assembly, and a plurality of pins retained in a second set of the through holes of the board of the circuit board assembly.

Abstract: A tuning circuit for a circuit board having an inductor coupling a first and a second trace, the tuning circuit including a first tuning coil having a loop partially extending over the inductor and a second tuning coil having a loop also partially extending over the inductor. The loop of the second tuning coil also partially extends over the loop of the first tuning coil. The circuit is tuned by adjusting the spacing between the loops of the first and second tuning coils and/or adjusting the spacing between the loops and the circuit board.