Whenever Category 6A UTP cables capable of supporting 10 Gig applications are combed or tightly bundled, you risk increased alien crosstalk (AXT) that can wreak havoc on high speed transmission. Why? Alien crosstalk is caused by interference on a cable pair from a pair in an adjacent cable, and it became an issue with Category 6A cabling characterized up to 500 MHz simply due to the higher level of frequency and noise. So it’s easy to understand that anytime cables are evenly combed or tightly bundled together so that they lay adjacent to one another, alien crosstalk will increase—precisely why worst-case alien crosstalk testing involves six around one.
Sourced through Scoop.it from: www.flukenetworks.com