A-5
User Guide for the Catalyst Express 520 Switches
OL-12761-02
Appendix A Reference
Connector Specifications
Connector Specifications
This section describes the connectors on the switch.
• 10/100 and 10/100/1000 Ports, page A-5
• SFP Module Ports, page A-8
• Dual-Purpose Ports, page A-9
10/100 and 10/100/1000 Ports
The 10/100 and 10/100/1000 Ethernet ports use standard RJ-45 connectors and
Ethernet pinouts with internal crossovers. These ports have the send (TD) and
receive (RD) signals internally crossed so that a twisted-pair straight-through
cable and adapter can be attached to the port. Figure A-3 shows the pinout for a
10/100 port.
Figure A-3 10/100 Port Pinouts
H5318
231 45678Pin Label
1
2
3
4
5
6
7
8
RD+
RD-
TD+
NC
NC
TD-
NC
NC
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