With respect to communications systems, here narrowly defined as computer network system, grounding became a concern when IEEE 802.5 (Token Ring) and 802.3 (10Base-5 and 10Base-2) were being deployed in 1980s. They required shielded cables (STP and coaxial, respectively). However, by the advent and wide spread utilization of Ethernet over twisted pair (802.3i, 802.3u, etc.) in which shielding was not required, grounding was relegated to rack, cabinets, and pathways as matter of routine following the established standards.
Communications Grounding System: Best Practices
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