Universal Broadband Router Hardware Installation Guide

B-6
Cisco uBR10012 Universal Broadband Router Hardware Installation Guide
OL-18259-01
Appendix B Cable Specifications
Fast Ethernet Port Cables and Pinouts
How to Identify an RJ-45 Straight-Through Cable
You can identify a Straight-through cable by comparing the two modular ends of the cable. Hold the
cables side-by-side with the tab at the back. A straight-through cable wires are in the same sequence at
both ends of the cable. See
Figure B-6.
Figure B-6 Straight-through Cable
Figure B-7 RJ-45 Straight-Through Cable Identification
Note If your cable was purchased from Cisco Systems, pin 1 is white.
Table B-3 lists the pinouts for the two Fast Ethernet ports.
12345678
127838
12345678
62740
Pin 1 Pin 1
Ta b l e B-3 10Base-T RJ-45 Connector Pinouts
RJ-45 Pin Description RJ-45 Pin Description
1 Tx+ 3 Rx+
2 Tx– 6 Rx–