Cisco PIX 520 - PIX Firewall 520 User Manual page 93

Appendix A Reference
Connector Specifications
You can the Cisco Configuration Assistant to enable the automatic
medium-dependent interface crossover (auto-MDIX) feature. When the
auto-MDIX feature is enabled, the switch detects the required cable type for
copper Ethernet connections and configures the interfaces accordingly.
Therefore, you can use either a crossover or a straight-through cable for
connections to a copper 10/100, 10/100/1000, or 1000BASE-T SFP module port
on the switch, regardless of the type of device on the other end of the connection.
The auto-MDIX feature is enabled by default.
You can use Category 3, 4, or 5 cabling when connecting to
10BASE-T-compatible devices. You must use Category 5 cabling when
connecting to 100BASE-TX-compatible devices.
Use a straight-through cable to connect two ports only when one port is
Note
designated with an X. Use a crossover cable to connect two ports when both ports
are designated with an X or when both ports do not have an X.
This applies only to switches on which auto-MDIX is disabled.
User Guide for the Catalyst Express 520 Switches
A-7
OL-12761-02