![background image](http://html1.mh-extra.com/html/ibm/4002ac2/4002ac2_installation-and-user-manual_3394515048.webp)
Figure 11). If the hub is equipped with an uplink port, it will require a
straight-through cable instead of a crossover cable.
Note:
The 802.3ab standard (automatic MDI or MDIX detection) calls for automatic
negotiation of the connection between two 1000Base-T ports. Therefore, a
crossover cable may not be required; a straight-through cable may work as
well. For more information about this feature, refer to the
FastIron and
TurboIron 24X Configuration Guide
.
Note:
The 802.3ab standard calls for automatic negotiation of the connection
between two 1000Base-T ports. Consequently, a crossover cable may not be
required; a straight-through cable may work as well.
UTP crossover cable
10/100BaseTX
unused 8
unused 7
unused 5
unused 4
8 unused
7 unused
4 unused
5 unused
2
1
1
1
2
3
3
8
net_com007
6
6
Figure 10. 10 UTP crossover cable
Cat-5 crossover cable
1000BaseT
8
7
4
5
2
1
1
1
2
3
3
8
6
4
5
6
7
8
net48bg028
Figure 11. Cat-5 crossover cable for 1000Base-T
22
IBM x-series of Ethernet Switches Installation and User Guide
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