Disclosed is a high-density port converter for use in a network incorporating high-density connections for increased efficiency, network operation and management. The high-density connections are incorporated into the patch panel, network switch, and cables that connects them, as well as into cable analyzers and printed circuit boards (PCBs) which allow for a complete network within a single computer running virtualization software.

A conduction path includes a housing, a twisted wire pair that is obtained by twisting together a pair of coated wires, a pair of terminal fittings that are individually fixed to front end portions of the pair of coated wires and are inserted into the housing from behind, and a wire holder that is separate from the housing and holds the twisted wire pair such that the twisted wire pair can move together with the wire holder, wherein the wire holder can move close to the housing in an axial direction and move in a circumferential direction relative to the housing. When the wire holder holding the twisted wire pair is moved close to the housing in the axial direction and moved in the circumferential direction relative to the housing, untwisted regions of the coated wires are twisted and return to the twisted state.

A conduction path includes a housing, a twisted wire pair that is obtained by twisting together a pair of coated wires, a pair of terminal fittings that are individually fixed to front end portions of the pair of coated wires and are inserted into the housing from behind, and a wire holder that is separate from the housing and holds the twisted wire pair such that the twisted wire pair can move together with the wire holder, wherein the wire holder can move close to the housing in an axial direction and move in a circumferential direction relative to the housing. When the wire holder holding the twisted wire pair is moved close to the housing in the axial direction and moved in the circumferential direction relative to the housing, untwisted regions of the coated wires are twisted and return to the twisted state.

A connection module includes a first assembly and a second assembly. The first assembly has a rest portion for resting thereon an exposed portion of a covered electrical wire for differential signal transmission. A cable accommodates the covered electrical wire in a jacket. The exposed portion is not covered with the jacket, exposing a covering of the covered electrical wire. The second assembly has a presser portion pressing the exposed portion rested on the rest portion against the rest portion. A position of the exposed portion is determined by combining the first assembly with the second assembly.

A twisted pair cable includes a twisted portion in which two communication wires are twisted each other and an untwisted portion in which the two communication wires are untwisted. The terminal is connected to a tip part of the untwisted portion. A crimping member includes a barrel portion crimped to an end part of the twisted portion on the side of the untwisted portion and a non-crimping portion extending from the barrel portion toward the untwisted portion and not crimped to the twisted pair cable. The non-crimping portion includes a facing portion facing the two communication wires in the untwisted portion and rising portions rising from both end part in a direction orthogonal to a longitudinal direction of the untwisted portions in the facing portion. The rising portions surround the two communication wires together with the facing portion.

Twisted pair communication cables that include reduced or minimal use of colorant may include a plurality of twisted pairs of individually insulated conductors, and the respective insulation formed around each conductor may not be blended or compounded with any colorant. A separator may be positioned between at least two of the plurality of twisted pairs, and the separator may include one or more physical indicia that facilitate identification of the plurality of twisted pairs. A jacket may be formed around the plurality of twisted pairs and the separator.

Twisted pair communication cables that include reduced or minimal use of colorant may include a plurality of twisted pairs of individually insulated conductors, and the respective insulation formed around each conductor may not be blended or compounded with any colorant. A separator may be positioned between at least two of the plurality of twisted pairs, and the separator may include one or more physical indicia that facilitate identification of the plurality of twisted pairs. A jacket may be formed around the plurality of twisted pairs and the separator.

Twisted pair communication cables that include reduced or minimal use of colorant may include a plurality of twisted pairs of individually insulated conductors, and the respective insulation formed around each conductor included in the plurality of twisted pairs may include one or more polymeric materials that are not blended or compounded with any colorant. Individual shield layers may be provided for two or more of the plurality of twisted pairs. Physical indicia may be selectively formed on at least two of the shield layers, and the physical indicia may facilitate identification of the plurality of twisted pairs. Additionally, a jacket may be formed around the plurality of twisted pairs and the shield layers.

Twisted pair communication cables that include reduced or minimal use of colorant may include a plurality of twisted pairs of individually insulated conductors, and the respective insulation formed around each conductor included in the plurality of twisted pairs may include one or more polymeric materials that are not blended or compounded with any colorant. Individual shield layers may be provided for two or more of the plurality of twisted pairs. Physical indicia may be selectively formed on at least two of the shield layers, and the physical indicia may facilitate identification of the plurality of twisted pairs. Additionally, a jacket may be formed around the plurality of twisted pairs and the shield layers.

A modular communications plug is disclosed having a simplified design that allows for more efficient termination of a cable into the plug. The plug includes modular components that are applicable to different applications.