
Transition Networks
SISGM
–CHAS L2/L3 Switch User Guide
33625 Rev. B
Page
27
of
234
7
BI_DD+
8
BI_DD-
The SISGM series support auto MDI/MDI-X operation. You can use a cable to connect the switch
to a PC. The table below shows the 10BASE-T/ 100BASE-TX MDI and MDI-X port pin outs.
10/100 Base-T(X) MDI/MDI-X Pin Assignments
:
Pin Number
MDI port
MDI-X port
1
TD+(transmit)
RD+(receive)
2
TD-(transmit)
RD-(receive)
3
RD+(receive)
TD+(transmit)
4
Not used
Not used
5
Not used
Not used
6
RD-(receive)
TD-(transmit)
7
Not used
Not used
8
Not used
Not used
1000 Base-T MDI/MDI-X Pin Assignments
:
Pin Number
MDI port
MDI-X port
1
BI_DA+
BI_DB+
2
BI_DA-
BI_DB-
3
BI_DB+
BI_DA+
4
BI_DC+
BI_DD+
5
BI_DC-
BI_DD-
6
BI_DB-
BI_DA-
7
BI_DD+
BI_DC+
8
BI_DD-
BI_DC-
Note:
“+” and “-” signs represent the polarity of the wires that make up each wire pair.