RJ45 Wiring Straight-through Cable

A straight-through cable, also known as straight cable, is one where both ends of the cable follow the same wiring scheme. For example, if both ends of a cable followed the T568A scheme, then that would make a straight cable. If both ends followed the T568B scheme, then that too would make a straight cable.

Uses for Straight Cables

• Connecting PC to wall outlet
• Connecting Patch Panel to Hub
• Connecting Patch panel to Router
• Connecting Patch Panel to Switch

Straight cable with T568A at both ends

T568A	Pin Configuration	Ethernet function	T568A
	1	TX+
	2	TX-
	3	RX+
	4	NOT USED
	5	NOT USED
	6	RX-
	7	NOT USED
	8	NOT USED

Straight cable with T568B at both ends

T568B	Pin Connections	Ethernet function	T568B
	1	TX+
	2	TX-
	3	RX+
	4	NOT USED
	5	NOT USED
	6	RX-
	7	NOT USED
	8	NOT USED

Crimping Tool

As you can see, the configuration is very simple and providing you use the same colour wires at both ends, you can make a straight cable.

Networking professionals can readily make such cables using an RJ45 Crimp Tool, used for crimping the wires to the copper pins of the RJ45 socket.

This Article Continues...