Chapter 7
Cable Testing Fundamentals
7-2
Testing Twisted Pair Cables
Twisted pair wiring systems (Figure 7-1) typically employ four pairs of insulated
conductors and connectors that allow you to operate different network types on
the same cable (Table 7-1). Both unshielded (UTP) and foil shielded (STP, FTP)
cables are available.
or Solid Conductor
(4 Pairs)
Copper Drain Wire
(Shielded Cable only; STP)
Aluminum-Polyester Shield
(Foil Shielded Cable only; FTP)
The following diagram shows modular jack pin numbering and wiring
patterns for T568A, T568B, 10 Base-T, TP-PMD and USOC cabling
types.
Figure 7-1: Twisted Pair Cables
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