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B-2
Catalyst 3750 Switch Hardware Installation Guide
OL-6336-07
Appendix B Connector and Cable Specifications
Connector Specifications
10/100 and 10/100 /1000 Ports
The 10/100 and 10/100/1000 Ethernet ports on Catalyst 3750 switches use standard RJ-45 connectors
and Ethernet pinouts with internal crossovers. Figure B-2 and Figure B-1 show the pinouts.
Figure B-1 10/100 Port Pinouts
Figure B-2 10/100/1000 Port Pinouts
100BASE-FX Ports
The 100BASE-FX ports use MT-RJ connectors, as shown in Figure B-3. The 100BASE-FX ports use
50/125- or 62.5/125-micron multimode fiber-optic cabling.
You can connect a 100BASE-FX port to an SC or ST port on a target device by using one of the MT-RJ
fiber-optic patch cables listed in Table B-1. Use the Cisco part numbers in Table B-1 to order the patch
cables that you need.
H5318
231 45678Pin Label
1
2
3
4
5
6
7
8
RD+
RD-
TD+
NC
NC
TD-
NC
NC
60915
231 45678Pin Label
1
2
3
4
5
6
7
8
TP0+
TP0-
TP1+
TP2+
TP2-
TP1-
TP3+
TP3-