unshielded twisted pair



(UTP) Normal telephone wire (in the USA). It may be used for computer to computer communications, e.g. using a version of Ethernet or localtalk. It is much cheaper than standard "full-spec" Ethernet cable. It comes in five "catagories":

 cat.   wires   transmission
 1	two	voice no data (telephone cable)
 2	four 	data up to 4 Mbps
 3	four	data up to 10 Mbps
 4	four	data up to 16 Mbps
 5	four	data up to 100 Mbps