C-5
Cisco uBR7225VXR Universal Broadband Router Hardware Installation Guide
OL-17309-01
Appendix C Cable Specifications
Fast Ethernet Port Cables and Pinouts
Figure C-3
RJ-45 Crossover Cable Identification
Identifying 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. The straight-through cable’s wires are in the same sequence
at both ends of the cable. See
Figure C-4
.
Figure C-4
RJ-45 Straight-Through Cable Identification
Note
If your cable was purchased from Cisco, pin 1 is white. Pins 4, 5, 7, and 8 are not connected.
Table C-3
lists the pinouts for the two Fast Ethernet ports.
62741
Pin 1
Pin 2
Pin 3
Pin 6
62740
Pin 1
Pin 1
Table C-3
10BASE-T RJ-45 Connector Pinouts
RJ-45 Pin
Description
RJ-45 Pin
Description
1
Tx+
3
Rx+
2
Tx–
6
Rx–
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