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RJ-45 pin
allocation, X19
RJ-45 connector pins are configured as shown:
Ethernet RJ-45, X19
Pin Signal 802.3af End-Span (mode A) 802.3af Mid-Span (Mode B) Description
1 TXD+ Negative V
Port
Transmit data +
2TXD- Negative V
Port
Transmit data -
3 RXD+ Positive V
Port
Receive data +
4 EPWR+ Positive V
Port
Power from switch +
5 EPWR+ Positive V
Port
Power from switch +
6 RXD- Positive V
Port
Receive data -
7 EPWR+ Negative V
Port
Power from switch -
8 EPWR+ Negative V
Port
Power from switch -