Shielded Twisted Pair Wiring (STP)
We have been talking about unshielded twisted pair wiring.
Is there a shielded twisted pair wiring?
- Yes. It has a metal mesh shield around each pair to reduce cross-talk interference
- It also has a metal mesh shield around the four pairs to reduce external EMI
- It is no longer used extensively because UTP, which is much less expensive, was found to begood enough for normal environments
- However, we will see that Cat 7 wiring uses STP