Transmission Medium
Twisted pair (UTP, STP)
- two insulated copper wires arranged in a spiral fashion
- wire pair acts as a single communication link
- twist length varies from 2-6 inches
- thickness varies from 0.016 to 0.036 inches
- used in telephone networks
- used within buildings
- inexpensive compared to other media
- easy to work with
- poor noise and interference immunity
- twisted to avoid crosstalk