Specifications
Table Of Contents
- AT-8900 Series Hardware Reference
- Contents
- Models Covered By This Reference
- Why You Should Read This Reference
- Where To Find More Information
- Hardware Description
- Online Documentation
- AT-TFTP Server
- Using Windows Terminal and Windows Hyperterminal
- Switch Start-up
- RS-232 Terminal Port (ASYN0)
- Useful Cables
- Test Facility
- Power Supply Units (PSUs)
- Port, Connector, and Cable Combinations
- Troubleshooting
- Expansion Options
- Restricted Procedures
- Contacting Us
18 AT-8900 Series Switch
C613-03075-00 REV A
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. Figure 6 on page 18
illustrates the pin layout for RJ-45 connectors.
Figure 6: RJ-45 Pin layout.
1000BASE straight through cable
For 1000BASE network connections, all four pairs are used and the cable is
wired in a straight-through configuration. This cable can also be used, in
conjunction with the software test facility, to test 1000BASE network ports.
Table 6 on page 18 lists the pin assignments.
1000BASE crossover cable
For 1000BASE test cables, all four pairs are used and the cable is wired in either
a crossover or straight-through configuration. Table 7 on page 19 lists the pin
assignments for a crossover cable.
Table 6: Pin assignments, 10/100/1000BASE-T RJ-45 four pair straight-through
cable.
End 1 End 2
Pin Pair Pin Pair
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-
1
8
1
8
RJPIN