Track 1: Core/Legacy Networks

Solving the Elusive Problem of Alien Crosstalk in LANs


August 15, 2018 9:15 AM - 10:15 AM

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Russ Gundrum

BICSI – 1 CEC, ETA – 3 CEC’s

The Local Area Networking (LAN) industry is currently trying to support the upgrade of 2.5G and 5G Base-T Ethernet circuits over existing Category 5e or Category 6 cabling for the latest 802.11ac WiFi access point implementations, the majority which are comprised of unshielded twisted pair (UTP) facilities. However, potential interference issues such as Alien Crosstalk could cause performance problems preventing them from being successfully certified for such increased bandwidths. This presentation will discuss the problem and address methods to help mitigate this kind of interference to allow existing UTP cables to successfully deliver these high bandwidth type circuits, including the deployment of new G.Fast networks in MDU’s. This will include recent research the author performed at the AT&T Technology Lab at the University of Houston on: “ALSNR is nothing more than the same old inductive interference issues the telecom industry has been dealing with all these years!” https://www.researchgate.net/project/ALSNR-is-nothing-more-than-the-same-old-inductive-interference-issues-the-telecom-industry-has-been-dealing-with-all-these-years. He also presented these findings at the annual 2018 ATIS Protection Engineers Group (PEG) meeting in Huntsville, AL on March 14. https://www.atis.org/peg/program.asp