This procedure generally applies to Cat 5e RJ45 connectors. An alternate method is given for connectors 

What you need to make an ethernet cable patchcord –

• Crimping tool 
• Rj 45 Connector
• Ethernet/ LAN Cable

Step 1

Cut the cable to the length needed.

Step 2

Strip back the cable jacket approximately 1 inch.
Use the crimping tool cutter provided or strip by hand.
Be careful not to nick the individual wires.
Un-twist each of the 4 pairs and straighten each wire as much as possible between the fingers.

Step 3

Trim the tips of the wires with a crimping tool to make tips neat and reserve appropriate length.

Step 4

Use the 568-B or A wiring scheme on both ends for a standard patch cable.

Step 5 

Arrange the wires in the order and push the wires into the Cat6 connector to the deepest position.

Note: Your wire’s Outside Diameter(OD) including the plastic housing should not exceed 1.0mm to match the wire guide

• Bring all of the wires together as closely as possible.
• Hold the grouped (and sorted) wires together tightly between the thumb, and the forefinger.
• Cut all of the wires at a perfect 90-degree angle from the cable,
• 1/2 inch from the end of the cable jacket.
• Use a sharp cutting tool so as not to “squash” the wire ends.

Step 6

Put the wired crystal RJ45 end into the cable clamp for crimping.

With the connector pins facing up, carefully insert the wires into the connector.
Apply a moderate amount of force in order to properly seat the wires against the contacts in the connector.

Step 7

Put the wired crystal RJ45 end into the cable clamp for crimping. And,  squeeze hard so that the handle reaches its full swing.

Step 8 

Always use a cable tester to check for continuity, opens, and shorts.