Allied Telesis SwitchBlade 4000 Series Switch Hardware Reference - Manual (Page 43)

Hardware Reference 43
C613-03060-00 REV H
More information on pin assignments for the RS-232 Terminal Port can be
found in “Management Interfaces” on page 39.
Cables for RJ-45 Ethernet LAN Interfaces
For all 10BASE-T/100BASE-TX (10/100BASE) and 10BASE-T/100BASE-TX/
1000BASE-T (10/100/1000BASE) connections, a twisted pair cable with RJ-45
connectors must be used. 10/100BASE connections require at least two pairs to
be used, while 10/100/1000 connections require four pairs.
Table 7 on page 43 lists the cables used for network connections and testing of
RJ-45 interfaces.
Pin assignments
For twisted pair cables each pair is identified by two different colours. For
example, one wire might be red, and the other red with a white stripe. An RJ-45
connector must be fitted to both ends of the cable.
Caution. Do not plug a phone jack into any RJ-45 port. Doing so could damage
the switch. Use only twisted pair cables with RJ-45 connectors.
10/100BASE straight-through cable
If a twisted pair cable is to join two 10/100BASE network ports and only one of
the ports has an internal crossover (only one port is labelled with an “X”), the
two pairs should be straight through, as listed in Table 8 on page 43.
10/100BASE crossover cable
If a twisted pair cable is used to join two 10/100BASE network ports and either
both ports are labelled with an “X” or neither port is labelled with an “X”, a
crossover should be used. This cable is also used, in conjunction with the
Table 7: Cables for RJ-45 LAN interfaces.
Purpose Interface type Cable type Pairs Pin assignment
Network 10/100BASE Crossover or straight through Two or four Table 9 on page 44 or
Table 8 on page 43
Network 10/100/1000BASE Straight through Four Table 10 on page 44
Test 10/100BASE Crossover Two or four Table 9 on page 44
orTable 11 on page 45
Test 10/100/1000BASE Crossover or straight through Four Table 11 on page 45 or
Table 10 on page 44
Table 8: RJ-45 Pin assignments, two pair straight through cable.
End 1 End 2
1 (TX+) 1 (TX+)
2 (TX-) 2 (TX-)
3 (RX+) 3 (RX+)
6 (RX-) 6 (RX-)