Universal Broadband Router Hardware Installation Guide

B-5
Cisco uBR10012 Universal Broadband Router Hardware Installation Guide
OL-18259-01
Appendix B Cable Specifications
Fast Ethernet Port Cables and Pinouts
• Use a Category 3 UTP straight-through cable when connecting to a PC or other Ethernet device.
• Use a Category 5 UTP crossover cable when connecting 100Base-TX to a hub.
• Use a Category 5 UTP straight-through cable when connecting to a PC or other Ethernet device.
Note Cisco Systems does not supply Category 3 or Category 5 UTP RJ-45 cables; these cables are available
commercially.
How to Identify an RJ-45 Crossover Cable
You can identify a crossover cable by comparing the two modular ends of the cable. Hold the cables
side-by-side with the tab at the back. The first (far left) colored wire (pin 1) at one end of the cable is
the third colored wire (pin 3) at the other end of the cable. The second colored wire (pin 2) at one end
of the cable is the sixth colored wire (pin 6) at the other end of the cable. See
Figure B-4.
Figure B-4 Crossover Cable
Figure B-5 RJ-45 Crossover Cable Identification
12345678
127839
12345678
62741
Pin 1
Pin 2
Pin 3
Pin 6