The technology started with 10-Mb/s coax cabling (10BASE5). Twisted-pair and RJ45 connectors quickly replaced that, while fiber optics was implemented for high-speed, long-distance communication.
This image shows the difference between standard industrial Etherent cabling (top) with 4 twisted wire pairs and SPE cabling (bottom) with one pair of twisted wires. SPE delivers standard Ethernet ...
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