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Token Ring Media
This chapter examines the physical characteristics and requirements of both cabling and the
connectors and ports used in Token Ring networks.
Cabling Types
Shielded Twisted Pair (STP)
Shielded Twisted Pair cabling is a multistranded cable most often constructed of
eight 26 AWG conductive copper solid or stranded core wires. Each wire is
surrounded by a non-conductive insulating material such as Polyvinyl Chloride
(PVC). These wires are twisted around one another in a specific arrangement to
form pairs. The pairs are made up of associated wires - transmit wires are paired
with transmit wires, receive wires are paired with receive wires.
Each pair in the STP cable is then surrounded by a metallic foil shield that runs
the length of the cable. Some types of STP incorporate an additional braided or
foil shield that surrounds each of the shielded pairs in the cable. The overall cable
is wrapped in an insulating jacket which covers the shields and holds the wires
together.
Chapter 9
9-1
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