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Appendix A - Networking Connection
A.1 Switch's Data RJ45 Pin Assignments - 1000Mbps, 1000BASE-T
4.1.1.2
PIN
NO
1
2
3
4
5
6
7
8
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:
Contact
Media Dependent Interface
1
2
3
4, 5
6
7, 8
MDI
MDI-X
BI_DA+
BI_DB+
BI_DA-
BI_DB-
BI_DB+
BI_DA+
BI_DC+
BI_DD+
BI_DC-
BI_DD-
BI_DB-
BI_DA-
BI_DD+
BI_DC+
BI_DD-
BI_DC-
RJ45 Connector Pin Assignment
MDI
Tx + (transmit)
Tx - (transmit)
Rx + (receive)
Rx - (receive)
MDI-X
Media Dependent Interface-Cross
Rx + (receive)
Rx - (receive)
Tx + (transmit)
Not used
Tx - (transmit)
Not used
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