L1-Copper
Layer 1 - Copper Copper cables carry low voltage electric signals (NEC defines low volatge systems between 0 and 49 Volts) Back in the day, copper was the medium initally used to cross the counrty back in the days of CW, and Telegrams. With the Advent of the Telephone this copper need to handel more bandwidth and longer distances “twisted pair” copper wires were used for telephone wires. These twised pair wires have evoled over time to bring us to todays CAT6a 10 Gig and Cat8 40 Gig Copper cabling....