Cisco Catalyst 6840 Series User Manual

Figure 35: Four Twisted-Pair Semi-Cross Cable Schematic
Figure 36: Two Twisted-Pair Straight-Through Cable Schematic
Figure 37: Two Twisted-Pair Crossover Cable Schematic
Identifying a Crossover Cable
To identify a crossover cable, compare the two modular ends of the cable. Hold the cable ends side-by-side,
with the tab at the back. The wire connected to the pin on the outside of the left plug should be a different
color from the wire connected to the pin on the inside of the right plug.
Figure 38: Identifying a Crossover Cable
Console Port Adapter Pinouts
The RS-232 console port uses an 8-pin RJ-45 connector. Use an RJ-45-to-DB-9 adapter cable to connect the
switch console port to a console PC. You need to provide a RJ-45-to-DB-25 female DTE adapter to connect
the switch console port to a terminal.
Catalyst 6840-X Switch Series Hardware Installation Guide
73
Module Connectors and Cable Specifications
Console Port Adapter Pinouts

Cisco Catalyst 6840 Series Specifications

General

Brand	Cisco
Model	Catalyst 6840 Series
Category	Switch
Language	English