Bay Technical Associates 304 用户手册
Troubleshooting and Diagnostics
893-01010-A
4-3
MDI and MDI-X Connections
BayStack switches use MDI-X ports that allow you to connect directly to end
stations without using crossover cables (see
stations without using crossover cables (see
). Ports that implement the
crossover function internally are known as MDI-X ports (where “X” refers to the
crossover function).
crossover function).
Figure 4-1.
MDI-X to MDI cable connections
Note:
For the transmitter of one device to connect to the receiver of another
device, the sum of crossovers must always be an odd number.
1
8
1
8
8
1
8
1
RX+
RX-
TX+
TX-
TX+
TX-
RX+
RX-
MDI-X port
BayStack 303/304 switch
End station
Straight-through cable
MDI port
T
R
T
R
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
617EB
89301010.BK Page 3 Tuesday, June 10, 1997 8:00 PM