Abstract: The present disclosure relates to a rack for mounting telecommunication chassis each adapted for receiving cross-connect modules. The rack includes a frame defining a bay formed between two spaced-apart, vertical end walls. The bay is sized for receiving the telecommunication chassis. The rack also includes a cable management structure connected to the frame. The cable management structure defines first and second separate vertical channels. The first vertical channel defines a first passage area sized for receiving a plurality of cross-connect cables from the telecommunication chassis. The second vertical channel defines a second passage area sized for receiving power and ground wires from the telecommunication chassis.

Abstract: A power takeoff inductor is an inductor comprised of a hybrid core. Materials with varying low and high permeabilities are combined to create a common hybrid core for the inductor. The inductor can be used in power transmission systems where signals of lower frequencies are transmitted along the same conductors with signals extending across a broad range of higher frequencies. The inductor is used to extract signals having low frequencies without degrading other high frequency signals.

Abstract: A forward-reverse crosstalk compensation method is provided for compensating capacitance/inductance on a printed circuit board of a connector. The method includes a forward compensation process and a reverse compensation process. The forward compensation process compensates the unbalanced capacitance in the plug of the connector by using the parallel conductive lines or wires. The reverse compensation process can be used to compensate the unbalance capacitance/inductance caused by the forward compensations in the same pair combination of the connector. In both forward compensation and reverse compensation processes, electro-magnetic fields, such as capacitors, can be formed to balance the capacitance/inductance on the printed circuit board of the connector.

Abstract: A bendable cable trough section is provided having a U-shaped cross-section, such as for holding telecommunications cables. In one embodiment, alternating segments of rigid first sections and compressible second sections are provided. The first sections are preferably made of plastic. The second sections are preferably made of foam joined with adhesive to the first sections. Elongated strengthening members may be provided.

Abstract: Fiberoptic connector and adapter assembly includes a fiberoptic connector received within an adapter. The connector has a cover on the connector housing. The cover pivots between open and closed positions to expose or cover, respectively, a optical fiber contained within the connector. Longitudinal guides of the connector are received cooperating with longitudinal guides of the adapter to direct the connector into the adapter in a prescribed alignment. A cam pin is carried on the adapter to engage a cam pin receiving slot on the cover to urge the cover to the open position as the connector is inserted into the adapter.

Abstract: A circuit arrangement that reduces selected intermodulation. The circuit arrangement includes a signal amplifier coupled to a bandpass filter via an electrical path. Signal energy outside the passband is reflected back into the amplifier and causes intermodulation. The electrical path is constructed with a length that reduces intermodulation, where the length is an odd multiple of one-fourth the wavelength of a predetermined frequency in the passband. The length of the electrical path reduces intermodulation because certain signals reflected by the bandpass filter are approximately 180.degree., or an odd multiple thereof, out of phase. Energy of problematic signals that are near the edge of the passband or in the stopband is reduced, such as third order intermodulation product and pairs of signals that produce third order intermodulation products.

Abstract: A phase-locked loop utilizes a pair of diodes in a loop filter design for providing fast acquisition of a reference signal during an acquisition mode, while maintaining a more narrow bandwidth in a locked mode of operation. During the acquisition mode, the diodes are conducting and the loop filter bandwidth is wide, which provides for a faster response time. As the reference signal is acquired, the diodes no longer conduct and the loop filter bandwidth becomes more narrow for tracking the reference signal.

Abstract: A module for radio frequency signal circuits includes an electrically conductive housing. Coax connectors are secured to the rear face of the housing. A circuit board is contained within the interior spaced between sidewalls of the housing. A ground side of the circuit board includes a layer of electrically conductive material which is electrically connected to the housing. Coax cables extend within the interior of the housing from the coax connectors and between the ground side of the circuit board and an opposing sidewall. An opposite side of the circuit board contains circuit components interconnected with one another through a plurality of circuit paths.

Abstract: A method for selectively modifying an information signal at a remote site in a telecommunications system having a head end and a number of remote sites connected to form a ring. An initiation signal is received at a head end. The initiation signal indicates when to start modifying the information signal. Further, the method retrieves at least one stored modification signal. The method also transmits the modification signal to at least one selected remote site over a packet ring network of the telecommunications system. The packet ring network includes ring switches that self-learn the location of network devices based on addresses in packets processed by the switches and which learn that addresses of network devices associated with other ring switches are reachable out of at least one ring port of the ring switch. The information signal is modified with the modification signal. The method also detects the end of the modification signal and ends the modifying of the information signal.

Abstract: A switching coaxial jack (10') includes first and second parallel aligned electrically conductive coaxial center conductors. The center conductors are divided into front portions (42a', 44a') and rear portions (50a', 52a'). The rear portions include movable springs to separate the rear portions from the front portions. A V-shaped switching spring (70') connects the rear portions. Levers (90', 92') push the rear portions out of connection with the switching spring and into connection with the front portions upon insertion of plugs into forward ports of the jack. Waveguides (210, 212, 214, 216, 218, 220, 222) provide matching of the impedance of the jack to the impedance of the telecommunications line.

Abstract: A multiple dwelling or business integrated service unit for a communication system including a hybrid fiber/coax distribution network. The service unit has an enclosure that includes a removable front cover. The enclosure also has a back panel, top and bottom panels, and first and second sides. A plug-in coaxial common electronics module is received in the enclosure's first side. The common electronics module has a structural frame with a cover plate which closes off the first side of the enclosure when the module is plugged in. The unit also has at least one channel card received in the second side of the enclosure. An access panel door removably covers and closes off the second side of the enclosure. The enclosure includes a plurality of radiating fins on its exterior surface for dissipating heat generated in part by the module and the channel unit.

Abstract: A bandpass filter arrangement that includes a weakly coupled coaxial resonator to reduce the fluctuation in frequency response of the filter arrangement. A bandpass filter is coupled to the output of a low noise amplifier. The characteristic fluctuation in frequency response in the passband of the bandpass filter is reduced with a coaxial resonator that is disposed proximate the filter arrangement.

Abstract: The apparatus includes a plurality of components, including a first component, a center component, a component adjacent to the center component, and a last component. The apparatus also includes a first signal source generating a first signal, and a second signal source generating a second signal. The second signal source is separated by one or more components from the first signal source. A first bus couples the first signal source to the plurality of components. A second bus couples the second signal source to the plurality of components. The first and second signals are distributed substantially in-phase to the components.

Abstract: Dynamically modifiable call processing logic includes creating a Basic Call State Machine (BCSM) which is an instantiation of a dynamically executable Call Model having one or more initialization files and one or more shared library functions. The Call Model supplies the BCSM with Advanced Intelligent Network (AIN) compliant basic call processing logic as well as other features and configuration instructions. The BCSM is provided with a number of states, each of which corresponds to a point-in-call (PIC). Each PIC includes one or more substates and may include one or more trigger detection point (TDP). Each TDP includes at least one trigger.

Abstract: The invention relates to a filter and a method for manufacturing a filter. The filter comprises a shell construction with a wall construction and a bottom portion, which form at least one section in the shell construction. The filter further comprises at least one resonator within a section of the shell construction. At least the bottom portion of the shell construction and one or more resonators, or at least the part thereof close to the bottom portion of the shell construction, are an integral unit extruded from the same basic block in one piece.

Abstract: Fiberoptic connector and adapter assembly includes a fiberoptic connector received within an adapter. The connector has a cover on the connector housing. The cover pivots between open and closed positions to expose or cover, respectively, a optical fiber contained within the connector. Longitudinal guides of the connector are received cooperating with longitudinal guides of the adapter to direct the connector into the adapter in a prescribed alignment. A cam pin is carried on the adapter to engage a cam pin receiving slot on the cover to urge the cover to the open position as the connector is inserted into the adapter.

Abstract: A phase lock loop circuit. The phase lock loop circuit includes first and second pass gates. The pass gates include signal inputs that receive first and second reference signals, respectively. The pass gates also have enable inputs. The phase lock loop also includes a loop filter that is coupled to the outputs of the first and second pass gates. A loop oscillator is coupled to the output of the loop filter. A strobe circuit is coupled to the output of the loop oscillator. The strobe circuit provides an input signal to the enable inputs of the first and second pass gates so as to sample the first and second reference signals. The loop filter uses the samples of the first and second reference signals to create a control signal that forces the loop oscillator to output a signal with a phase that is between the phases of the first and second reference signals.

Abstract: A transmission system (10). The transmission system communicates data to a number of subscribers (14a, 14b). The transmission system includes a transceiver (12) that has a number of highly directional antennas (28). A number of digital repeaters (16a, 16b, 16c) are disposed in a geographic region serviced by the transceiver. The repeaters include a sectorized antenna that communicates with subscribers in a number of sectors of the geographic region of the repeater. The repeater also includes an upstream demodulator/modulator circuit (19). The upstream demodulator/modulator circuit demodulates data from signals from subscribers that were modulated with a first modulation technique, and generates a re-modulated signal with the data using a second modulation technique.

Abstract: The passband ripple of a filter arrangement, including an amplifier and a bandpass filter, is tuned to a desirable level at the expense of the output return loss of the filter arrangement. Thus, the output return loss is increased as a result of reducing the ripple. To reduce the output return loss to a desired level, a lossy network is coupled to the output of the filter. The output return loss is reduced by twice the insertion loss of the lossy network. The insertion loss of the lossy network can be compensated for by increasing the gain of the amplifier.

Abstract: A fiber optic connector has two ferrules contained within a single connector housing with the ferrules positioned in parallel, spaced-apart alignment. The connector includes a first mating fastener exposed on exterior sides of the connector housing. A fiber optic adapter has an open end to slidably receive the connector housing. The adapter includes two parallel sleeves contained within the adapter housing and aligned with the ferrules of the connector. The adapter includes a second mating fastener exposed to an interior of the adapter housing to releasably mate with the first mating fastener when the connector housing is in the full insert position.