I'll answer your first question first: why not 1000Base-T? Well, the simple answer is that 100Base-TX requires 4 wires whereas 1000Base-T requires 8. While 4 more wires may not sound like much, I've found it exponentially more difficult. With 4 wires, I feel that I have good individual control. With 8, there always seem to be one or two wires with a mind of their own. And, how often do you need more than 10 megabyte transfer speeds?
Next, your second question: why would you want to create your own Ethernet wire? Why can't you just buy pre-made? This answer comes in two parts: (1) it's fun, and (2) I never seem to have the right length on-hand. When 14 feet is required, 10 feet doesn't cut it and 25 feet seems like overkill. Sure, in some cases, the right size can be ordered, but I'd rather make it on-the-spot than wait for delivery. And, some sizes simply aren't sold.
Do I have your attention now? Good. To make your own cable, you'll need 2-3 tools (in addition to some raw cable):
- RJ45 crimper (appx. $20)
- RJ45 connectors/jacks (appx. $10 for 100)
- wire cutters (appx. $20) (optional)
- pin 1: white/green
- pin 2: green
- pin 3: white/orange
- pin 6: orange