Cisco 3750G-12S Hardware Installation Guide - Page 110
/100 and 10/100/1000 Ports, 100BASE-FX Ports
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Connector Specifications Appendix B Connector and Cable 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 Pin 1 2 3 4 5 6 7 8 10/100 Port Pinouts Label RD+ RDTD+ NC NC TDNC NC 12345678 H5318 Figure B-2 Pin 1 2 3 4 5 6 7 8 10/100/1000 Port Pinouts Label TP0+ TP0TP1+ TP2+ TP2TP1TP3+ TP3- 12345678 60915 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. Catalyst 3750 Switch Hardware Installation Guide B-2 OL-6336-10