Communications Systems, Inc.

Communication Systems LLC

Csi/suttle Apparatus Corporation

Donald A Ward

Brett I Utesch

Ronald L Fredrickson

Chad M Paulson

An impedance blocking filter circuit is used in telecommunication systems for interconnecting between incoming telephone lines carrying Digital Subscriber Line (DSL) signals and a customer's terminal equipment in order to block impedances above a desired frequency. The impedance blocking filter circuit includes a low pass filter circuit having at least one capacitive pole providing component. The impedance blocking filter circuit also includes a tank circuit coupled in series with the at least one capacitive pole providing component to provide impedance matching for the customer's terminal equipment.

Impedance blocking filter circuit for digital subscriber line communication systems

A mounting block has a plurality of insulation displacement connectors or terminal clips, mounted in openings in the block in traverse rows which are evenly spaced along the length of the block. The block is a dielectric body of conventional shape having fanning strip sections at its opposite margins. The insulation displacement connectors or terminal clips are loosely received through holes in the block and have a pair of wire-receiving prongs that are symmetric about a central axis so that the terminal clips do not require a specific orientation relative to the center line of the block. The terminal clips each have a wire-retaining receptacle near the upper end and are slit so that a wire may be slid down and the wire insulation displaced for electrical connection to the terminal clip. The slit forms resilient arms that are tapered from an upper end downwardly. Cross-talk between terminal clips that are adjacent in longitudinal direction is controlled by altering the amount of plastic material spacing adjacent pairs of terminal clips in longitudinal direction such that, in regions where the plastic material is reduced, an air gap between such terminal clips to reduce the dielectric constant between that pair of terminal clips.

Cross-talk reduction mounting block for connectors

An electrical connector reduces cross talk between conductors carrying high frequency signals between input and output terminals. The connector has a lead frame with conductors that have generally parallel portions, but wherein some of the conductors have portions formed as out of the plane of the parallel portions as a hump. The humps have sections that provide spring contacts for engagement with a plug. The cross talk between specific conductors is further reduced by including capacitive coupling between selected conductors, and by positioning the conductors in desired locations relative to the conductors of other pairs of wires. The connector is provided with a load bar system for permitting easy coupling of the individual wires to input terminals.

Connector for reducing electromagnetic field coupling

A connector for connecting electrical wires includes a housing or enclosure that surrounds contacts for making a connection to a plug. The housing is filled with a colloidal gel environmental protection material that includes particles that will absorb electromagnetic radiation, particularly in the radio frequency range to form a colloidal gel. The gel can be any one of the existing polyurethane, or silicone based gels used for environmental protection of connectors, such as telephone jacks. The particles are preferably made from either Parites or ferrites and range in size from 5 microns to 100 microns. The loading of the particles can be between 5% and 80% of the overall weight of the finished colloidal gel. The colloidal gel can be formed so that it is sufficiently cohesive to form into strips that can be wrapped around connectors as well.

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Danube, MN, United States of America

Donald A Ward