SMC Networks EX245-SPN1A Operation Manual page 19

NOTE
・
When you use the EX245-SPN2A/EX245-SPN3A and the Autonegotiation function is disabled,
you must select the correct network cable, refer to Fig 3-11, 3-12.
・
Auto crossover function is not available when the Autonegotiation function is disabled.
・
Auto crossover function shall be capable of switching over their twisted pair ports automatically
between MDI and MDI-X pin assignment.
The following figure Fig. 3-11 shows examples on the use of two different cable types.
MDI
RJ45
TD+ Transmit data+ 1
RD+ Receive data+ 3
TD- Transmit data- 2
RD- Receive data- 6
MDI
RJ45
TD+ Transmit data+ 1
RD+ Receive data+ 3
TD- Transmit data- 2
RD- Receive data- 6
MDI-X
RJ45
RD+ Receive data+ 1
TD+ Transmit data+ 3
RD- Receive data- 2
TD- Transmit data- 6
Patch cable
Pin
M12
1
2
3
4
Crossover cable
Pin
M12
1
2
3
4
Crossover cable
Pin
M12
1
2
3
4
Fig. 3-11 Patch and Crossover Cable details
- 19 -
Pin
MDI-X
RJ45 M12
1 1 RD+ Receive data+
3 2 TD+ Transmit data+
2 3 RD- Receive data-
6 4 TD- Transmit data-
Pin
MDI
RJ45 M12
1 1 TD+ Transmit data+
3 2 RD+ Receive data+
2 3 TD- Transmit data-
6 4 RD- Receive data-
Pin
MDI-X
RJ45 M12
1 1 RD+ Receive data+
3 2 TD+ Transmit data+
2 3 RD- Receive data-
6 4 TD- Transmit data-
No.EX※※-OMW0011-A