Ethernet Crossover Cable: Functions, Uses, and Wiring Guide
Table of content
Introduction:
In case you are confused about differentiating between an ethernet crossover cable and a straight-through ethernet cable (or simply saying, ‘Ethernet cable), this blog holds much for you. An ethernet cable is mainly used in network connections when you want to connect your device to the network or network to the device. Whereas, a crossover cable connects similar ethernet network devices together. Both these types of ethernet cabling work in a similar manner, but some differences need to be explored one by one. Once you have clarity about ethernet crossover cable, its use, types, and working, you will no longer face any problem in choosing the best possible option between ethernet crossover cable and other families of ethernet cables. Thus, start reading this blog to learn everything about ethernet crossover cable.
Understanding Ethernet Crossover Cables:
Being an IT/networking enthusiast, you must know about certain protocols or standards. These protocols and standards are not only limited to ethernet cable; whenever there is a configuration of any cable, there will be a specific standard to be followed by that particular cable. T568A and T569B are the standards defined by TIA/EIA for terminating twisted-pair cables in an 8-pin 8-contacts (8P8C) RJ45 jack. Before going deep into the ethernet crossover cable, it is crucial to understand the T568A and T569B stands.
T568A is engineered for reverse compatibility with old telephone wires.
T569B is structured for excellent signal isolation and to avoid disturbing noise. It is aligned with advanced networking systems and accessories.

An Ethernet crossover cable is a type of network cable to connect two Ethernet network devices without the interference of a switch or a router a router in between. Such type of network connectivity enables complicated transmission of data between computers, routers, and other networks. They are the same as straight cables in many ways but ethernet crossover cables have pairs of wires that work in a crisscross manner and set them apart from other types of cables. The internal wiring of an ethernet crossover cable pushes incoming and outgoing signals back. It has an infrastructure that keeps the data output pin on one end of the cable in touch straight with the data input pins on the other end of the cable.
What is an Ethernet Cable?

An Ethernet cable comes into play when you need to establish a high-speed wired network connection between two devices. It is composed of a four-pair cable that features twisted pair conductors. This network cable facilitates data transmission on both ends of the cable which is called RJ45 connectors.
These cables are categorized as Cat 5, Cat 5e, Cat 6, and UTP cable. These categories support different ethernet network speeds. The Cat 5 supports 10/100 Mbps Ethernet network while Cat 5e and Cat 6 cable support 10/100/1000 Mbps.
What is Straight Through Cable?

Ethernet Crossover Cable vs Straight-Through Cable:

We know that not everyone has time to go through complex paragraphs. Therefore, let us save you time by breaking the topic into simple chunks:
A Straight-Through Cable:
- A type of CAT5 with RJ-45 connectors at each end, and each has the same pinout.
- One of the most commonly used cable formats for network cables.
- Connected to the router’s LAN port to a switch/hub’s uplink port.
- Used to connect a computer with a cable or DSL modem’s LAN port.
- Used when you want to connect two devices of different types.
- Helpful when connecting a router’s WAN port to a cable or DSL modem’s LAN port.
- mainly used for connecting, unlike devices.
An Ethernet Crossover Cable:
- A type of CAT where one end is T568A configuration, and the other end is T568B Configuration.
- Used only for certain applications.
- Is easy/suitable to connect a router’s LAN port to a switch or hub’s regular port
- Connected to a router’s LAN port with switch/hub normal port.
- Utilized when connecting two devices of the same type.
- Helpful in connecting two switches/hubs by using the normal port.
- Mostly used for connecting devices.
Ethernet Crossover Cable and Straight-Through: Which One to choose?
An Ethernet crossover cable can be utilized when connecting similar devices, such as connecting a computer system to another. This dilemma occurs when you have both options in front of you and you can’t decide which way to go. No worries, we are here to help you out.
Whether you are going to choose ethernet crossover cable or straight-through cable, depends on your requirements. You should know which devices you are going to connect or need to connect when choosing between crossover and straight-through cable.
If you are going to connect a computer to a computer or a switch to a switch, you will need an ethernet crossover cable. On the other hand, you have to use straight-through cable when connecting a switch to a router or a PC.
When To Use Ethernet Crossover Cable:
In order to understand the use cases of ethernet crossover cable, its comparison with straight-through cable is significant. Hence, a quick comparison is here:
Ethernet Crossover Cable | Straight-Through Cable |
Hub >>> Hub Hub >>> Switch PC >>> Router Router >>> Router PC >>> PC Router >>> PC |
Hub >>> Router Hub >>> PC Router >>> Hub Router >>> Switch PC >>> Hub Switch >>> PC |
Thus, the above-mentioned table proves that it depends on your needs, requirements, and business scenarios to choose between ethernet crossover cables and straight-through cables.
Conclusion:
Ethernet crossover cables are mostly used by individuals working in similar environments. Such a type of ethernet establishes a connection between devices of a similar nature, i.e. PC to PC, router to router, and hub to hub. Instead of running for advantages and perks, first, consider your needs if you want to use ethernet crossover cable before straight-through or any other. There are only some cases in which you can use ethernet cross-over cable, otherwise, you have to turn your head towards other options.
Frequently Asked Questions:
What is an Ethernet?
Ethernet is a form of communication technology that works as a bridge between different devices to help them communicate with one another. Mainly used for LAN-type channels, it is also employed for establishing WAN-type channels.
What is the difference between patch cable and crossover cable?
Crossover cables are network cables used to connect similar devices like computers to computers and routers to PCs. Whereas, patch cables (another name for straight-through cables) are used to connect different types of devices, such as Hub to routers or switches to PCs.
Are ethernet crossover cables still used?
Yes, they are widely used in older networks. But, according to a survey, conducted recently, advanced devices don’t need crossover cables anymore.
What is an example of a crossover cable?
An ethernet crossover cable connects a host directly to another host. The best example of a crossover cable connection is computer to computer connection where two hosts are connected directly to one another.
What is an RJ45 crossover cable?
RJ45 cable uses two types of standards on both ends; T568A on one and 568B on the other. It works in a send-back manner and receives incoming signals.