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Appendix
1000BASE-T Port Specifications
The switch supports auto-MDIX on all 1000BASE-T ports. You can use straight cables in all network
connections with computers, servers, other switches and hubs.
Use Category 5e or 6 UTP/STP cables for 1000BASE-T connections.
Also ensure that the cable length does not exceed 100 meters.
The pin assignments for 1000BASE-T MDI ports and MDI-X ports are shown in the table below.
Pin number
MDIX / MDI signal
Signal function
1
BI_DA+ / BI_DB+
Send and receive data A (+) / Send and receive data
B (+)
2
BI_DA- / BI_DB-
Send and receive data A (-) / Send and receive data
B (-)
3
BI_DB+ / BI_DA+
Send and receive data B (+) / Send and receive data
A (+)
4
BI_DC+ / BI_DD+
Send and receive data C (+) / Send and receive data
D (+)
5
BI_DC- / BI_DD-
Send and receive data C (-) / Send and receive data
D (-)
6
BI_DB- / BI_DA-
Send and receive data B (-) / Send and receive data
A (-)
7
BI_DD+ / BI_DC+
Send and receive data D (+) / Send and receive data
C (+)
8
BI_DD- / BI_DC-
Send and receive data D (-) / Send and receive data
C (-)
+ and - refer to the polarity of the wires making up each wire pair.
