Abstract: A method of producing a distributed reflector that includes a grating, wherein regions (21) are provided in the grating material transversely to the longitudinal axis of the grating, wherein the refractive index in said regions is lower or higher than the refractive index in surrounding parts of the grating, and wherein the distance between mutually adjacent regions (22) is varied. The invention is characterised by giving the regions (21) mutually the same width, and determining the positions of the various regions along the longitudinal axis (X) of the grating in relation to the wavelengths to be reflected.

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: An electronic circuit is provided. The electronic circuit includes a first port, a second port, a first path coupled between the first and second ports, and a second, alternative path coupled between the first and second ports. The electronic circuit also includes at least one tunable circuit element shared between the first and second, alternative paths. The first path includes a delay line with a length selected to match at least one characteristic of the first path with a corresponding characteristic of the second path within a selected tolerance.

Abstract: A cover assembly for covering an outlet box. The assembly includes a cover plate and an insert piece having a middle member and two retention members. The cover plate defines a cover aperture which receives the middle member of the insert piece from a back side of the cover plate. The retention members of the insert piece abut the back side of the cover plate. The insert piece may define a connector aperture for receiving a cable connector and may include designation figures. The assembly may also include a strap defining mounting apertures for receiving snap-fit connector modules. The strap may define shelves along two opposed sides for receiving the retention members of an insert piece. The strap may also define tab slots for receiving tabs of the insert piece.

Abstract: A polishing puck assembly is provided for use in polishing a fiber optic connector. A slidable weight rests on the fiber optic connector to urge the ferrule of the fiber optic connector to extend below a bottom surface of the puck assembly. The puck assembly can be manipulated relative to polishing material to polish the end of the fiber optic connector. The polishing material can be circular in shape and held by a palette defining one or more circular pockets for holding the polishing material. Different polishing material can be positioned in the different pockets. A circular guide can be utilized in the circular pocket wherein the guide includes a circular opening with a center offset from a center of the circular guide.

Abstract: The invention relates to the characterization of tunable lasers. One particular method of characterizing a semiconductor laser is useful for a laser having first and second tuning sections controlled by respective first and second tuning currents. The method includes measuring power output from the laser as a function of the first and second tuning currents, and creating an image of power as a function of the two tuning currents. The image is analyzed to determine different modes, each mode corresponding to limited ranges of the first and second tuning currents. A preferred combination of the first and second tuning currents is determined for each mode and an acceptable operating region is defined for each mode.

Abstract: A multimedia patching box including a generally rectangular housing. The housing includes a first wall positioned opposite from a second wall. The housing also includes opposing third and fourth walls that extend between the first and second walls. A panel is mounted adjacent the front of the housing. The panel is mounted to pivot about a pivot axis between an open position and a closed position. The pivot axis is located adjacent to the third wall of the housing and extends generally along the third wall of the housing. A plurality of multimedia connectors are mounted on the panel. The housing defines at least one cable access opening defined through at least one of the first and second walls at a location adjacent the third wall. A cable management structure is connected to the back side of the panel. The cable management structure defines a cable guiding channel that extends generally along the pivot axis of the panel and generally aligns with the at least one cable access opening.

Abstract: An isolator unit includes a mount for mounting three isolator components, resulting in a smaller package. The isolator components are attached to the mount using a technique that reduces the possibility that the orientations of the components change with a change in temperature. Consequently, the operational characteristics of the isolator have a reduced temperature dependence.

Abstract: The present invention relates to a center conductor insulator with a tapered entry for use with a coaxial cable transmission line connector that provides guiding and centering of a center conductor pin within the connector. The present invention further relates to a front sleeve assembly for use with a coaxial cable transmission line connector which incorporates a center conductor insulator with a tapered entry to guide and center a center conductor pin within the connector. The present invention also relates to a compression ring assembly for mounting a connector to a cable, the assembly having a collet engaging a tapered rear seal to compress the collet about the cable. The present invention further relates to a method of mounting a connector to a cable with a compression ring assembly incorporating a collet and tapered rear seal.

Abstract: A method for frequency and mode stabilisation of a tuneable laser that has at least three sections, such as a Bragg laser or GCSR laser, where measurable magnitudes are measured and the laser has been characterised with respect to a number of operation points, and where the values of the measurable magnitudes are stored in a microprocessor or corresponding device. The invention is characterised in that the values of one or more of the measurable magnitudes (E) are caused to be non-extreme values; in that the measurable magnitudes include back power in addition to front power and frequency; and in that control currents (I1, I2, I3; I1, I2, I3, I4) for the gain section (P1), the phase section (N2; N3) and the reflector section (N3; N4) respectively of said laser, and when applicable also for the coupler section (N2) of said laser, are caused to be controlled on the basis of the measured values of said measurable magnitudes while keeping both the front power and back power constant.

Abstract: A central office line unit (COLU) for a pulse code modulation (PCM) upstream and downstream system in a universal digital loop carrier (UDLC) includes a hybrid circuit for transmitting/receiving an analog signal to/from a switch. An analog-to-digital converter is provided for receiving the analog signal from the hybrid circuit and converting the analog signal to a converted digital signal. A digital transmission circuit transmits/receives a digital signal to/from a remote terminal. A quantizer is provided for evaluating and processing the converted digital signal so that only valid states of the converted digital signal are transmitted to the digital transmission circuit for transmission to the remote terminal. A receiver is used for receiving the digital signal from the digital transmission circuit and for evaluating and processing the digital signal so that only valid states of the digital signal are outputted from the receiver.

Abstract: An electronic module having a chassis and a single backplane disposed within the chassis. A plurality of bridge circuit cards is disposed within the chassis and is electrically connected to the single backplane. Each of the plurality of bridge circuit cards is for converting between a local area network protocol and a wide area network protocol. A hub circuit card is disposed within the chassis and is electrically connected to the single backplane so that the hub circuit card is electrically connected to each of the plurality of bridge circuit cards. The single backplane is connectable to each of a plurality of remote units for respectively electrically connecting each of the plurality of remote units to each of the plurality of bridge circuit cards. The single backplane is connectable to a data network for electrically connecting the data network to the hub circuit card.

Abstract: A cable management cabinet assembly for telecommunications equipment. The assembly includes a cabinet frame with sidewalls and vertical support members. A cable management bracket having an elongated member is fastened to the support members. A plurality of fingers project outwardly from the elongated member. The fingers are spaced apart along the length of the elongated member. Gaps sized to receive telecommunications cables are positioned between the fingers. Bend radius limiters are preferably connected to the fingers to prevent cables passing through the gaps from being bent beyond predetermined bend radius requirements. The bracket defines a vertical cable pathway between the side walls and the fingers for guiding cables within the cabinet.

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: A device and method for selectively hydrogen loading one or more portions of an optical fiber is described. The device includes a housing that defines a first optical fiber port, a second optical fiber port, a chamber within the housing extending from the first optical fiber port to the second optical fiber port to receive the portion of the at least one optical fiber, a hydrogen input port, and a hydrogen channel extending from the hydrogen input port to a portion of the chamber. A portion of an optical fiber is disposed in the chamber. Hydrogen is introduced into the chamber through a hydrogen channel defined by the housing. The hydrogen is then loaded into the portion of the optical fiber within the chamber.

Abstract: A front access splitter assembly that fully supports lifeline POTS and lifeline ISDN (Integrated Services Digital Network) service requirements is shown and described in this disclosure.

Abstract: An electronics enclosure is provided. The enclosure includes a modular card cage adapted to receive one or more electronic circuit cards and a heat sink adapted to protrude through an opening of an enclosure and couple to the modular card cage. The modular card cage and the heat sink provide an isolated heat transfer path for heat, produced by each of the one or more electronic circuit cards, to be removed from the enclosure.

Abstract: Couplers for a cable trough system including a spacing defined by first and second guiding surfaces, the spacing being sized to receive the terminal end of a trough member into the spacing. One or more springs are carried on the couplers and may be at least partially disposed within the spacing between the first and the second guiding surfaces. The springs urge the terminal end of the trough member against the coupler upon insertion of the terminal end into the spacing. One or more locking elements are coupled adjacent to the springs to move between a locking position and a released position. The locking elements may slide longitudinally or move perpendicularly to the couplers. A first trough member may be released from the couplers independent from a second trough member coupled to the couplers. Methods for use of the couplers are also provided.

Abstract: The present invention relates to an in-line fiber optic device including a housing and an opening extending through the housing defining an optical pathway, the pathway including an optically significant element for altering a signal transmitted through the pathway, and the device including a housing with a removable portion to permit access to the optical path. The present invention also relates to a fiber optic device with a housing defining an optical path with a first and second ferrule, the optical path including an optically significant element and a first end of the housing about an outer end of the first ferrule removable to permit access to the first end of the first ferrule. The present invention further relates to a system for altering the signal being transmitted through an optical fiber telecommunications connection. The present invention also relates to a method of providing an optically significant element in an optical fiber telecommunications assembly.