Appendix A Reference
Connector Specifications
A-6
User Guide for the Catalyst Express 520 Switches
OL-12761-02
Figure A-4 shows the pinout for a 10/100/1000 port.
Figure A-4 10/100/1000 Port Pinouts
Caution PoE faults are caused when noncompliant cabling or powered devices are
connected to a PoE port. Only standard-compliant cabling can be used to connect
Cisco pre-standard IP Phones or wireless access points or
IEEE 802.3af-compliant devices to PoE ports. A cable or device that causes a PoE
fault must be removed from the network.
When connecting 10/100 and 10/100/1000 ports to compatible devices such as
servers, workstations, and routers, you can use a two or four twisted-pair
straight-through cable wired for 10BASE-T and 100BASE-TX. Figure A-8 shows
the two twisted-pair straight-through cable schematics. Figure A-10 shows the
four twisted-pair straight-through cable schematics.
When connecting the ports to other devices, such as switches or repeaters, you can
use a two or four twisted-pair crossover cable. Figure A-9 shows the two
twisted-pair crossover cable schematics. Figure A-11 shows the four twisted-pair
crossover cable schematics.
60915
2 3145678Pin Label
1
2
3
4
5
6
7
8
TP0+
TP0-
TP1+
TP2+
TP2-
TP1-
TP3+
TP3-
