20
Installation
(i.e., cables in which the twisted-pair outputs have been crossed).
See Appendix B for more information on crossover cable pinouts.
The table below describes when to use which cable type.
Table 2-1: Using Straight-Through and Crossover Cables
SWITCH
PORT USED
DEVICE
PORT
TYPE
CABLE TO USE
Normal
Server (or PC)
Straight-Through (||)
Switch
or Hub
Non-
Uplink
Crossover (X)
Uplink
Straight-Through (||)
Uplink
Server (or PC)
Crossover (X)
Switch
or Hub
Non-
Uplink
Straight-Through (||)
Uplink
Crossover (X)
Setting the Duplex Mode
Each port of the device can be set for half-duplex or full-duplex
operation. The two 10/100Mbps ports and the MII connector can
be set to either full-duplex or auto-detect duplex mode. At half-
duplex operation, packet transmission and reception do not occur
simultaneously, thus communication speed is limited to 100Mbps
using 100BASE-TX mode and 10Mbps using 10BASE-T mode. At
full-duplex operation, packet transmission and reception occur
simultaneously, thus communication speed is doubled to 200Mbps
using 100BASE-TX mode and 20Mbps using 10BASE-T mode.
Full-duplex operation can be used on links between the 10/100