AT-TS90TR 10Base-T Switch With 100Base-T Access
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UNSHIELDED TWISTED PAIR (UTP)—A cable used in 10BASE-T
wiring that consists of at least two twisted pairs of 22 to 26 AWG wire.
The pairs should have at least 3 twists per foot and have an impedance of
100
Ω
. Level 3 and Level 4 UTP cable generally fits these criteria.