Crossover cable pinouts

Crossover cable pinouts

Two pairs crossed, two pairs uncrossed

10baseT/100baseTX crossover ( shown as T568A )
Pin	Connection 1 pair	Connection 2 pair	Connection 1	Connection 2	Pins on plug face (jack is reversed)
1	3	2	white/green stripe	white/orange stripe
2	3	2	green solid	orange solid
3	2	3	white/orange stripe	white/green stripe
4	1	1	blue solid	blue solid
5	1	1	white/blue stripe	white/blue stripe
6	2	3	orange solid	green solid
7	4	4	white/brown stripe	white/brown stripe
8	4	4	brown solid	brown solid

Certain equipment or installations, including those in which phone and/or power are mixed with data in the same cable, may require that the"non-data" pairs 1 and 4 (pins 4, 5, 7 and 8) remain un-crossed.

Gigabit crossover All four pairs crossed 10base-T/100base-TX/1000base-TX/T4 crossover (shown as T568B)
Pin	Connection 1 pair	Connection 2 pair	Connection 1	Connection 2	Pins on plug face (jack is reversed)
1	2	3	white/orange stripe	white/green stripe
2	2	3	orange solid	green solid
3	3	2	white/green stripe	white/orange stripe
4	1	4	blue solid	white/brown stripe
5	1	4	white/blue stripe	brown solid
6	3	2	green solid	orange solid
7	4	1	white/brown stripe	blue solid
8	4	1	brown solid	white/blue stripe

In practice, it does not matter if your Ethernet cables are wired as T568A or T568B, just so long as both ends follow the same wiring format.

Networks created using crossover cables

A two-computer network, sometimes called a peer-to-peer network, can be created using a crossover Ethernet cable. As in any other TCP/IP network, each computer needs to be assigned a unique IP address. In this network configuration, a default gateway is not used and can be unspecified.

Example crossover network configuration

	Machine 1	Machine 2
IP address	192.168.0.1	192.168.0.2
Subnet Mask	255.255.255.0

Information on how to deploy such network can be found here