Hardware Reference
In-Depth Information
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. In many cases you'll find that it is actually cheaper to purchase
pre-made cables than it is to build your own.
TP Wiring Standards
If you want to create TP cables yourself, be sure your cable pairs match the color coding
of any existing cable or the color coding of any prebuilt cabling you want to add to your
new network. Because there are eight wires in TP cables, many incorrect combinations
are possible. Several standards exist for UTP cabling.
Tip
The key is to be consistent. Use the same scheme for all your cables, and ensure that anyone
else working on your network understands this scheme.
ThemostcommonstandardistheAT&T258Aconfiguration(alsocalledEIA/TIA568B).
Table17.4
liststhewirepairingandplacementwithinthestandard8P8C(RJ-45)connect-
or.
Table 17.4 8P8C (RJ-45) Connector Wire Pairing and Placement for AT&T 258A/EIA 568B Stand-
ard
In
Figure 17.9
, an 8P8C (RJ-45) cable connector is wired to the AT&T 258A/EIA 568B
standard.
Figure 17.9
An AT&T 258A/EIA 568B standard-compliant 8P8C (RJ-45) connector.
