Local area network cabling arrangement
First Claim
1. A cabling media comprising:
- a plurality of pairs of conductors, each of said pairs including two metallic conductors each separately surrounded by an insulation and which along essentially the entire length of the cable are twisted together in accordance with a twist scheme selected from the group consisting of
1) a first pair having a twist length between about 0.43 and about 0.45 inches;
a second pair having a twist length between about 0.40 and about 0.42 inches;
a third pair having a twist length between about 0.58 and about 0.61 inches; and
a forth pair having a twist length between about 0.65 and about 0.69 inches; and
2) at least four pairs with each of the pairs having individual twist lengths equal to a common multiple of values within one of the specific ranges listed immediately above and wherein the range multiplied for each of the at least four pairs is a different specified range than that of any of the other at least four pairs;
wherein a conductor-pair within each of the specified ranges is adjacent to at least one of the conductor-pairs from one of the other specified ranges; and
a jacket which encloses the plurality of pairs of insulated metallic conductors.
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Accused Products
Abstract
A cabling media which is suitable for data transmission with relatively low crosstalk includes a plurality of metallic conductors-pairs, each pair including two plastic insulated metallic conductors which are twisted together. The characterization of the twisting is important and relates to parameters such as twist length as well as core strand length/lay. More specifically, particular combinations of twist lengths and core strand length/lay are purposely selected for each insulated pair of the cable in order to achieve performance capabilities that significantly surpass those required under TIA/EIA-568A. In one particular embodiment of this invention, a cable comprises as its transmission media, four twisted pair of individually insulated conductors with each of the insulated conductors including a metallic conductor and an insulation cover which encloses the metallic conductor. The twisting together of the conductors of each pair is characterized as specifically set out herein and the plurality of transmission media are enclosed in a sheath system which in a most simplistic embodiment may be a single jacket made of a plastic material. As a result of the particular twist scheme employed for the conductor pairs, operational performance of the resulting cable is improved. Also, the cable of this invention is relatively easy to connect and is relatively easy to manufacture and install.
91 Citations
21 Claims
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1. A cabling media comprising:
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a plurality of pairs of conductors, each of said pairs including two metallic conductors each separately surrounded by an insulation and which along essentially the entire length of the cable are twisted together in accordance with a twist scheme selected from the group consisting of
1) a first pair having a twist length between about 0.43 and about 0.45 inches;
a second pair having a twist length between about 0.40 and about 0.42 inches;
a third pair having a twist length between about 0.58 and about 0.61 inches; and
a forth pair having a twist length between about 0.65 and about 0.69 inches; and
2) at least four pairs with each of the pairs having individual twist lengths equal to a common multiple of values within one of the specific ranges listed immediately above and wherein the range multiplied for each of the at least four pairs is a different specified range than that of any of the other at least four pairs;wherein a conductor-pair within each of the specified ranges is adjacent to at least one of the conductor-pairs from one of the other specified ranges; and a jacket which encloses the plurality of pairs of insulated metallic conductors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A cabling media comprising:
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a plurality of pairs of conductors, each of said pairs including two metallic conductors each separately surrounded by an insulation and which along essentially the entire length of the cable are twisted together in accordance with a twist scheme selected from the group consisting of
1) a first pair having between about 17 and 19 twists per foot;
a second pair having between about 19 and 21 twists per foot;
a third pair having between about 27 and 28 twists per foot; and
a forth pair having between about 29 and 30 twists per foot; and
2) at least four pairs with each of the pairs having individual twist per foot values equal to a common multiple of values within one of the specific ranges listed immediately above and wherein the range multiplied for each of the at least four pairs is a different specified range than that of any of the other at least four pairs;wherein a conductor-pair within each of the specified ranges is adjacent to at least one of the conductor-pairs from one of the other specified ranges; and a jacket which encloses the plurality of pairs of insulated metallic conductors. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A carrier of communication signals comprising:
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a plurality of pairs of conductors, each of said pairs including two metallic conductors each separately surrounded by an insulation and which along essentially the entire length of the cable are twisted together in accordance with a twist scheme selected from the group consisting of
1) a first pair having between about 17 and 19 twists per foot;
a second pair having between about 19 and 21 twists per foot;
a third pair having between about 27 and 28 twists per foot; and
a forth pair having between about 29 and 30 twists per foot; and
2) at least four pairs with each of the pairs having individual twist lengths equal to a common multiple of values within one of the specific ranges listed immediately above and wherein the range multiplied for each of the at least four pairs is a different specified range than that of any of the other at least four pairs;wherein a conductor-pair within each of the specified ranges is adjacent to at least one of the conductor-pairs from one of the other specified ranges; and a trough which supports the plurality of pairs of insulated metallic conductors. - View Dependent Claims (20)
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21. A local area network comprising:
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at least first and second communication devices connected together such that communication signals are transportable between these devices by a plurality of pairs of conductors, each of said pairs including two metallic conductors each separately surrounded by an insulation and which along essentially the entire length of the cable are twisted together in accordance with a twist scheme selected from the group consisting of
1) a first pair having between about 17 and 19 twists per foot;
a second pair having between about 19 and 21 twists per foot;
a third pair having between about 27 and 28 twists per foot; and
a forth pair having between about 29 and 30 twists per foot; and
2) at least four pairs with each of the pairs having individual twist lengths equal to a common multiple of values within one of the specific ranges listed immediately above and wherein the range multiplied foe each of the at least four pairs is a different specified range than that of any of the other at least four pairs;wherein a conductor-pair within each of the specified ranges in adjacent to at least one of the conductor-pairs from one of the other specified ranges.
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Specification