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US 6,608,255 B1Granted
Local area network cabling arrangement having improved capacitance unbalance and structural return loss
AssigneeAvaya Technology Corp.
InventorsDaryle Pat Donner, Harold Wayne Friesen, David R. Hawkins, Stephen Taylor Zerbs
Life of this patent
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Abstract
A cabling media which is suitable for high performance data transmission includes a plurality of insulated metallic conductor-pairs, each pair including two plastic insulated metallic conductors which are twisted together. More specifically, the introduction of a periodic rotation along the length of each insulated conductor essentially acts to cancel out a large number of the adverse effects which may result due to a lack of conductor concentricity and/or dielectric eccentricity.
Claims12
A cabling media comprising:
- two individual insulated metallic conductors twisted together with a predetermined first twist length to form a first conductor pair;
- two individual insulated metallic conductors twisted together with a predetermined second twist length different than the first twist length of the first conductor-pair to form a second conductor pair;
- wherein at least one of the individual conductors in each of the first conductor-pair and the second conductor-pair has been rotated about its central axis at a predetermined rate of revolution prior to being twisted with another conductor to establish a conductor-pair;
- wherein the twist length, defined as the length per rotation of the individual conductors of one of the conductor-pairs is essentially the same as the twist length of the individual conductors of another conductor-pair and the twist length of both the first and second conductor-pairs is about five inches lay length;
- wherein the two twisted conductor-pairs having the shortest twist lengths are positioned diagonal relative to each other;
- and
- a sheath collectively surrounding the conductor-pairs.
4 more elements
A cabling media comprising:
- two individual insulated metallic conductors twisted together with a predetermined first twist length to form a first conductor-pair;
- two individual insulated metallic conductors twisted together with a predetermined second twist length different than the first twist length of the first conductor-pair to form a second conductor-pair, and wherein the individual conductors of the second conductor pair are twisted in a same direction as the individual conductors of the first conductor pair are twisted;
- two individual insulated metallic conductors twisted together with a predetermined twist length to form a third conductor-pair;
- wherein at least one of the individual conductors in each of the first conductor-pair and the second conductor-pair has been rotated about its central axis at a predetermined rate of revolution prior to being twisted with another conductor to establish a conductor-pair;
- wherein the two conductor-pairs having shortest twist lengths are positioned diagonal relative to each other;
- and
- a sheath collectively surrounding the conductor-pairs.
4 more elements
Dependencies are inferred from the claim text.