-18-
No.EX##-OMU0020-A
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.
Patch cable
MDI
Pin
Pin
MDI-X
TD+ Transmit data+
1
1
RD+ Receive data+
RD+ Receive data+
3
3
TD+ Transmit data+
TD- Transmit data-
2
2
RD- Receive data-
RD- Receive data-
6
6
TD- Transmit data-
Crossover cable
MDI
Pin
Pin
MDI
TD+ Transmit data+
1
1
TD+ Transmit data+
RD+ Receive data+
3
3
RD+ Receive data+
TD- Transmit data-
2
2
TD- Transmit data-
RD- Receive data-
6
6
RD- Receive data-
Crossover cable
MDI-X
Pin
Pin
MDI-X
RD+ Receive data+
1
1
RD+ Receive data+
TD+ Transmit data+
3
3
TD+ Transmit data+
RD- Receive data-
2
2
RD- Receive data-
TD- Transmit data-
6
6
TD- Transmit data-
Fig. 3-8 Patch and Crossover Cable details