Specifications

Hardware Reference 23
C613-03020-00 REV K
If a twisted pair cable is to join two ports and only one of the ports has an
internal crossover, the two pairs must be straight through, as listed in Table 5.
If a twisted pair cable is used to join two ports and either both ports are
labelled with an “X” or neither port is labelled with an “X”, a crossover must be
included in the wiring. Table 6 lists the RJ-45 crossover wiring pin assignments.
For 1000BASE-T RJ-45 cables, all four pairs are used and the cable is wired in a
straight-through configuration. Table 7 lists the pin assignments.
NEBS Compatibility
The Ethernet intra-building ports of the Rapier 48w are suitable for connection
to intra-building or unexposed wiring or cabling only. The Ethernet intra-
building ports of the Rapier 48w must not be metallically connected to
interfaces that connect to the OSP or its wiring. These interfaces are designed
for use as intra-building interfaces only (Type 2 or Type 4 ports as described in
GR-1089-CORE, Issue 4) and require isolation from the exposed OSP cabling.
The addition of Primary Protectors is not sufficient protection in order to
connect these interfaces metallically to OSP wiring.
Table 5: RJ-45 Pin assignments, straight through cable
End 1 End 2
1 (TX+) 1 (TX+)
2 (TX-) 2 (TX-)
3 (RX+) 3 (RX+)
6 (RX-) 6 (RX-)
Table 6: RJ-45 Pin assignments, crossover cable
End 1 End 2
1 (TX+) 3 (TX+)
2 (TX-) 6 (TX-)
3 (RX+) 1 (RX+)
6 (RX-) 2 (RX-)
Table 7: Pin assignments, 1000BASE-T RJ-45 cable
End 1 End 2
1 Pair 1+ 1 Pair 1+
2 Pair 1- 2 Pair 1-
3 Pair 2+ 3 Pair 2+
6 Pair 2- 6 Pair 2-
4 Pair 3+ 4 Pair 3+
5 Pair 3- 5 Pair 3-
7 Pair 4+ 7 Pair 4+
8 Pair 4- 8 Pair 4-