Abstract: Three or more groups of individually insulated conductors are optionally separately wrapped with insulating material and then either singly or collectively encircled with metal tape material. The groups are secured together by a strengthening steel tape and surrounding protective jacket. By way of example, a series of embodiments are described, each containing three groups of conductors or cores. Screen configurations are presented for enclosing all groups or only the carrier service groups with one tape element that weaves its way in and out between the groups so that each group or core is screened from all adjacent cores. Other configurations employ separate tapes, each enclosing a separate corresponding group. Finally, embodiments are disclosed in which one group is enclosed by one tape element, while two additional groups are collectively enclosed by a single tape element deployed somewhat "S" shape about the cores.

Abstract: Communication cables with cores that have groups of conductor pairs, that carry messages in opposite directions, in the same cable present the problem of crosstalk between the different groups. With the increase in carrier frequency that is used for communication, the crosstalk problem increases, and cables that were acceptable for lower frequency are no longer adequate. This invention provides more efficient shielding; is suitable for higher frequencies; provides a stronger cable structure; and reduces corrosion of the shielding.

Abstract: A cable screen for multipair communication cables is formed in the general shape of an H with the cross member being expandable by the application of gas pressure. The expansion process also aids in reducing the size of air pockets in any viscous cable fill present; and also creates a permanent duct within the core for supplying gas pressure to points along the cable route.

Abstract: Communication cables with cores that have groups of conductor pairs, that carry messages in opposite directions, in the same cable present the problem of crosstalk between the different groups. With the increase in carrier frequency that is used for communication, the crosstalk problem increases, and cables that were acceptable for lower frequency are no longer adequate. This invention provides more efficient shielding; is suitable for higher frequencies; provides a stronger cable structure; and reduces corrosion of the shielding.