I'm actually curious if you know how to do it though. I learned how to do it when I got my computer maintenance qualification but it seemed like a really rare skill in my home country of England. Since coming to Korea, I've met quite a few people who know how to do it. So, do you know how? If the answer is no, look here: http://www.wikihow.com/Make-a-Network-Cable The guide is okay, though I find the video helps more. It's a pretty useful skill since it's a lot cheaper than replacing them and you only really need the crimping tool.