Twisted pairs support less bandwidth than coaxial cable or optical fiber. Twisted pair cables are available unshielded (UTP) or shielded (STP), with UTP being the most common. Shielded twisted ...

Although swapping a Cat-5e patch cable with a Cat-7 one between a ... which worked fine even on Category 3 unshielded twisted pair (UTP) wiring, as is still commonly used for telephone wiring.