These cables are used in telephone lines to provide voice and data channels.
It is called RJ45.
twisted pair
RJ-45 connector
People use such cables for LAN connection
The twisting in a twisted pair cable helps make the cable immune to electromagnetic interference. These cables are of two types: Shielded and unshielded twisted pair.
if by "twisted pair cable" you mean a cat5 cable which is commonly used as an ethernet cable. then it´s made of copper.
with RJ 45 conecter & unshilded twisted pair cable
twisted pair cable can used as LAN connections....for example CAT5 and CAT6 both twisted pairs.
Twisted pair wiring is a digital signal.Coaxial cable is an analog signal.
cable
Shielded Twisted pair cable
A twisted pair cable consists of two copper conductors, each one with its own plastic insulation and twisted together