SMC Networks EX245-SPN1 Operation Manual page 18

NOTE
・
When you use the EX245-SPN2 and the Autonegotiation function is disabled, you must select
the correct network cable, refer to Fig 3-8, 3-9.
・
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. 3-8 shows examples on the use of two different cable types.
MDI
TD+ Transmit data+
RD+ Receive data+
TD- Transmit data-
RD- Receive data-
MDI
TD+ Transmit data+
RD+ Receive data+
TD- Transmit data-
RD- Receive data-
MDI-X
RD+ Receive data+
TD+ Transmit data+
RD- Receive data-
TD- Transmit data-
Patch cable
Pin
1
3
2
6
Crossover cable
Pin
1
3
2
6
Crossover cable
Pin
1
3
2
6
Fig. 3-8 Patch and Crossover Cable details
-18-
Pin MDI-X
1 RD+ Receive data+
3 TD+ Transmit data+
2 RD- Receive data-
6 TD- Transmit data-
Pin MDI
1 TD+ Transmit data+
3 RD+ Receive data+
2 TD- Transmit data-
6 RD- Receive data-
Pin MDI-X
1 RD+ Receive data+
3 TD+ Transmit data+
2 RD- Receive data-
6 TD- Transmit data-
No.EX##-OMU0020-A