These days if you go out and buy a network cable it would cost you about Rs. 100 per metre. But when connector breaks, or you realise that the cable you have is shorter, you need extension of sorts. This is all you need to start crimping your own network cables - one metre regular network cable @ Rs. 50, RJ45 connectors @ Rs. 3 per piece and a crimping tool @ Rs. 250.
Cut the outer cable jacket. You will see eight wires twirled around each other in pairs, one solid colour and the other striped. For a Straight cable, arrange the wires in the following sequence: white orange, orange, white green, Blue, White Blue, Green, White Brown and Brown.This is the same sequence to follow on both ends for a Straight cable.
For a crossover cable, follow the same sequence for one end. For the other end, arrange the wires as follows: White green, green, white orange, blue, white blue, orange, white brown and brown.
Once you confirm the wire sequence, cut the wires in equal length. Then slide the wires into the RJ45 connector. Insert the RJ45 connector into the crimping tool. Ensure the eight wires are pushed all the way into the connector. Now just squeeze the tool until you hear a click. That's it, you are done.