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Pictures coming soon!
| Why? |
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I wanted to make use of the existing structured cabling between my
workstation and my USB printer to avoid having a cable draped across a desk and
up a wall. |
| What? |
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USB specification limits
the length of a cable between full speed devices to 5 meters and low speed device to 3 meters. |
|
USB Pin Outs |
| |
| Pin |
Name |
Description |
Cable Colour |
| 1 |
Vcc |
+5V DC |
Red |
| 2 |
D- |
Data - |
White |
| 3 |
D+ |
Data + |
Green |
| 4 |
Gnd |
Ground |
Black |
|
| RJ45 Pin Outs |
| |
| Pin |
Name |
Description |
Cable Colour |
| 1 |
TX+ |
Transmit Data + |
White / Orange |
| 2 |
TX- |
Transmit Data - |
Orange |
| 3 |
RX+ |
Receive Data + |
Green/White |
| 4 |
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| 5 |
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| 6 |
RX- |
Receive Data - |
Green |
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| Putting it Together |
| |
So basically all I needed to do was cut off the ends of
two USB cables and crimp on an RJ45 plug at each end. I used the following pin
configuration.
| Pin |
Name |
Description |
Cable Colour |
| 1 |
D+ |
Data + |
Green |
| 2 |
Gnd |
Ground |
Black |
| 3 |
D- |
Data - |
White |
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| 6 |
Vcc |
+5V DC |
Red |
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The Completed Product
|
| |
| PC |
"A" Type Plug |
<----> |
RJ45 Plug |
| Structured Cabling |
RJ45 Socket |
<----> |
RJ45 Socket |
| Printer |
RJ45 Plug |
<----> |
"B" Type Plug |
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