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Flow Control
Half-duplex mode uses back pressure flow control to prevent the receiv-
ing buffer from being overrun by data from a source node. Full-duplex
mode uses the 802.3X flow control standard to prevent fast Physical
Ports data traffic from overrunning slow data traffic.
UTP Cable Connections
When making a connection to another device using straight-through
UTP cable, make sure MDI-X to MDI connection rule is followed. The
following figure illustrates the pin assignments of a straight-through
UTP and a crossover UTP cable:
Straight-through and Crossover UTP Cable
It is suggested to use straight-through UTP cables for all UTP connec-
tions. The maximum length and UTP cable categories used for the con-
nections to a 10BASE-T device and 100BASE-TX device are:
CONNECTED DEVICE UTP CABLE USED & MAXIMUM LENGTH
10BASE-T device Cat. 3, 4, 5 UTP (100 meters)
100BASE-TX device Cat. 5 UTP (100 meters)