Information Technology Reference
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keeps pairs totally separated and totally shielded. Believe it or not, the most com-
mon description for this new connector is “non-RJ” (Fig. 12.8), although EC7 is
another designation.
The RJ-style GG45 connector system is a completely screened plug and socket
that adds four new contacts to support Category 7 cable pairs. The connector can
be wired to support either Cat 5e, AC6, or Cat 7. If a lower category cable is
plugged in, the normal eight pins of the RJ-style interface are active and the Cat 7
pairs simply are open. However, when a compatible RJ-style Cat 7 cable is plugged
in, the four additional contacts are activated and all operation through the connec-
tor is over the Cat 7 paths.
Category 7 RJ-style cable/connector systems are tested to 600 MHz, and their
operation is at least comparable to AC6. In addition, because of the shielding prop-
erties of the cable and connectors, alien crosstalk is much less of a concern. The only
disadvantage is the higher cost of the components, relative to Cat AC6 and below.
FIGURE 12.7
RJ-Style Category 7 Connector. (Courtesy Kerpen.)
FIGURE 12.8
Non-RJ Category 7 connectors. (Courtesy The Siemon Company.)
 
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