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Tuesday, August 27, 2019

How many wire pairs are required for Gigabit Ethernet?

How many wire pairs are required for Gigabit Ethernet?

  • 3
  • 4
  • 6


How many pairs of wire does gigabit ethernet use on utp cable?

4 pairs of wires.

Ethernet Cat 5 cables have eight wires (four pairs), but under 10BaseT and 100BaseT standards (10 Mbps and 100 Mbps, respectively) only four (two pairs) of these wires are actually used. One pair is used for transmitting data and the other pair is used for receiving data.
Pin Color  Function
1 White with Green +TD
2 Green -TD
3 White with Orange +RD
4 Blue Not Used
5 White with Blue Not Used
6 Orange -RD
7 White with Brown Not Used
8 Brown Not Used
Ethernet standard uses a technique against electromagnetic noise called cancellation. As electrical current is applied to a wire, it generates an electromagnetic field around the wire. If this field is strong enough, it can create electrical interference on the wires right next to it, corrupting the data that were being transmitted there. This problem is called crosstalk.



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