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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
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