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Appendix A Networking Connection
A.1 Switch's Data RJ45 Pin Assignments - 1000Mbps, 1000BASE-T
PIN NO
MDI
MDI-X
1
BI_DA+
BI_DB+
2
BI_DA-
BI_DB-
3
BI_DB+
BI_DA+
4
BI_DC+
BI_DD+
5
BI_DC-
BI_DD-
6
BI_DB-
BI_DA-
7
BI_DD+
BI_DC+
8
BI_DD-
BI_DC-
Implicit implementation of the crossover function within a twisted-pair cable, or at
a wiring panel, while not expressly forbidden, is beyond the scope of this standard.
A.2 10/100Mbps, 10/100BASE-TX
When connecting Switch to another Fast Ethernet switch, a straight-through or
crossover cable might be necessary. Each port of the Switch supports auto-MDI/
MDI-X detection, meaning you can directly connect the Switch to any Ethernet
devices without making a crossover cable. The following table and diagram show
the standard RJ45 receptacle/connector and their pin assignments:
RJ45 Connector Pin Assignment
Contact
MDI
Media Dependent Interface
MDI-X
Media Dependent Interface - Cross
1
Tx + (transmit)
Rx + (receive)
2
Tx - (transmit)
Rx - (receive)
3
Rx + (receive)
Tx + (transmit)
4, 5
Not used
6
Rx - (receive)
Tx - (transmit)
7, 8
Not used
