Planet XGS3-24042 - Chapter 85 Appendex a; Switch Srj-45 Pin Assignments; 10;100 Mbps, 10;100 Base-TX

85-1
Chapter 85 APPENDEX A
85.1 A.1 Switch's RJ-45 Pin Assignments
1000Mbps, 1000Base T
Contact
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.
85.2 A.2 10/100Mbps, 10/100Base-TX
When connecting your 10/100Mbps Ethernet Switch to another switch, a bridge or a hub, a straight or
crossover cable is necessary. Each port of the Switch supports auto-MDI/MDI-X detection. That means you
can directly connect the Switch to any Ethernet devices without making a crossover cable. The following table
and diagram show the standard RJ-45 receptacle/ connector and their pin assignments:
RJ-45 Connector pin assignment
Contact MDI
Media Dependant
Interface
MDI-X
Media Dependant
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
The standard cable, RJ-45 pin assignment