Cisco VG224 Hardware Installation Guide - Page 64

Identifying a Rollover Cable, A-1

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Console and Auxiliary Port Cables and Pinouts Appendix A Cable Specifications and Information Identifying a Rollover Cable You can identify a rollover cable by holding the plugs side by side, with the tab at the back and comparing the modular plugs at the two ends of the cable. The wire connected to the pin on the outside of the left plug should be the same color as the wire connected to the pin on the outside of the right plug. (See Figure A-1 on page A-2.) If your cable comes from Cisco Systems, pin 1 is white on one plug, and pin 8 is white on the opposite plug. (A rollover cable reverses the wire connections at the opposite ends: 1 to 8, 2 to 7, 3 to 6, 4 to 5, 5 to 4, 6 to 3, 7 to 2, and 8 to 1.) Figure A-1 Identifying a Rollover Cable Pin 1 and pin 8 are the same color Pin 1 Pin 8 H11417 Cisco VG224 Voice Gateway Hardware Installation Guide A-2 OL-5006-04

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A-2
Cisco VG224 Voice Gateway Hardware Installation Guide
OL-5006-04
Appendix A
Cable Specifications and Information
Console and Auxiliary Port Cables and Pinouts
Identifying a Rollover Cable
You can identify a rollover cable by holding the plugs side by side, with the tab at the back and
comparing the modular plugs at the two ends of the cable. The wire connected to the pin on the outside
of the left plug should be the same color as the wire connected to the pin on the outside of the right plug.
(See
Figure A-1 on page A-2
.)
If your cable comes from Cisco Systems, pin 1 is white on one plug, and pin 8 is white on the opposite
plug. (A rollover cable reverses the wire connections at the opposite ends: 1 to 8, 2 to 7, 3 to 6, 4 to 5, 5
to 4, 6 to 3, 7 to 2, and 8 to 1.)
Figure A-1
Identifying a Rollover Cable
Pin 1
Pin 8
H11417
Pin 1 and pin 8 are
the same color