568A vs. 568B: What’s the Difference?

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Oftentimes, selecting between different technical options, particularly if you are a beginner, can be daunting. Such is the controversy between 568A and 568B.

568A and 568B are color wiring codes that determine the order of wires for circuiting RJ45 connectors and modular plugs. They are majorly used in the network and telecommunication industry and are accredited under the ANSI/TIA-568-C wiring standards, and have identical functions in a modern data network. Their termination standard is significant forinternetproviders, business systems, homeowners, and internet infrastructure.

According to ANSI Accredited Telecommunications Industry Association, ANSI/TIA, T568A is suitable for residential installations as it is compatible with old technology. However, the two color code schemes are entirely a personal preference. Unless you got a specific need to work with a particular one, research no further and go for it.

Regardless of the similarities between the 568A and 568B standards, they also have noticeable differences, and it is vital to learn more about them before you commence any establishment, expansion, or networking activity. Which way should you go? Find out more.

568A vs. 568B: Side-By-Side Comparison

Specifications 568A 568B
Specifications 568A 568B
What is it An international standard that defines how pins and wires in an RJ45 connector are arranged or terminated An international standard that defines how pins and wires in an RJ45 connector are arranged or terminated
Primary Use Wiring the RJ45 eight-position modular plugs correctly Wiring the RJ45 eight-position modular plugs correctly
Basic Application Residential applications and Federal contracts Telecommunication installations, Terminal connections, and Network equipment
Name EIA/TIA-568A EIA/TIA-568B
Conception 1985 1985
Initial release 1991 1991
Technical Committee American National Standard Institute, ANSITelecommunications Industry Association, TIAElectronics Industrial Association, EIA American National Standard Institute, ANSITelecommunications Industry Association, TIAElectronics Industrial Association, EIA
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05/30/2023 08:51 pm GMT

568A vs. 568B: What s The Difference?

568A and 568B connect discrete wires to the Ethernet cable. They are identical in performance and connectivity, with the only variation being the arrangement of the cable pairs on set pins. Typically, wiringcablescomprise eight wires twisted together in four pairs. A primary color can identify these pairs; each pair should carry a signal and return.

Wiring cableshave four colors, blue, green, orange, and brown. For every connector plug, each pair of these cables is twisted together. The visible difference between the pin-to-pair scheme is the orange and green pairs. They can be swapped in the cable, and despite that, they still effectively direct through connections.

Wiring the standards from one device to another for the same scheme has no problem. It will make no difference in functionality and connectivity. Wiring a specific scheme when each segment is connected to a modular device or at one end of the punch block makes one standard advantageous over the other and offers a more natural progression of pairs.

Cabling expansions vary depending on the network wiring scheme so that the wires can match up to transmit data signals. Both 568A and 568B standards have a straight scheme of wiring.

Some networking applications will require anEthernet crossover cablewith a 568A connector and a 568B connector on the ends of the cable. However, the crossover cable is basically for direct computer-to-computer connections.

For proper network functionality, familiarize yourself with the pinout positions, various uses of every cable, and other comparison factors. Below is a comprehensive breakdown of the difference between 568A and 568B.


Various compatibility differences could affect your choice of RJ45 scheme. 568A is more compatible with telephone wires, while 568B is perfect for signal isolation and noise protection for new network systems and products. These wiring schemes have similar electrical properties and can be used for network wiring and applications.

568B scheme is more up-to-date and is a broad choice wiring scheme because it matches the initial version of the 258 color code. It is more cost-effective and offers backward compatibility with a single pair of Universal Service Order Codes, USOC wiring schemes. Also, most network equipment and color connections use the 568B wiring standard.


Applications are helpful when connecting Data Terminating Equipment, DTE to Data Communications Equipment, DCE, to computers, modems, routers, or Ethernet switches.

Most network applications require a standard cabling method to run different projects and temporary operations, which might be specific to the scheme type. 568A wiring pattern is an excellent choice for standard applications. While it provides backward compatibility to single and double-pair USOC wiring schemes, the 568B standard offers backward compatibility to only one-pair USOC wiring schemes.

Pinout Positions

Pin-out positions are the arrangement of pins on an integrated circuit. 568A and 568B have different pin locations, distinguished by different colors. Using the same color scheme at all ends of your cable is safe, while a mix-up of the schemes on each end of the cable could lead you to a wire map problem. Below is the pinout location analysis for standard 568A and 568B.

Standard 568A

  • Pin 1: White and Green
  • Pin 2: Green
  • Pin 3: White and Orange
  • Pin 4: Blue
  • Pin 5: White and Blue
  • Pin 6: Orange
  • Pin 7: White and Brown
  • Pin 8: Brown

Standard 568B

  • Pin 1: White and Orange
  • Pin 2: Orange
  • Pin 3: White and Green
  • Pin 4: Blue
  • Pin 5: White and Blue
  • Pin 6: Green
  • Pin 7: White and Brown
  • Pin 8: Brown

568A vs. 568B: 5 Must-Know Facts

Following the 568A and 568B terminal standards, here are some important facts you need to know before deciding on the wiring scheme to use for your project.

  • Both 568A and 568B are technical standards for commercial building cabling for telecommunications products and services.
  • Commercial and residential building environments require a structured cabling system that depends on 568A and 568B for operations.
  • 568A and 568B standards include cable types, connections, distance, cable system topologies, cable termination standards, performance characteristics, and cable testing methodologies.
  • Cabling standards 568A and 568B have a ten-year lifespan, saving you from spending money more frequently.
  • In modern data structure systems, 568A and 568B possess similar functions and performance from a practical aspect.

568A vs. 568B: Which One is Better? Which One Should You Use?

568A and 568B are widely used by Internet providers, homeowners, and business personnel as termination standards in telecommunication and Internet infrastructure. However, the two technical options are still debatable, as they bring up needless confusion and contention.

Forcing one to understand the origin of the standards and how to use the scheme is now a thing of the past. Simply go for something that suits your interest and needs; unless you have a specific preference or a project guideline, go for the recommended wiring scheme. If your installation requires reverse compatibility, use 568A; if you require a maximum future expansion to fast speeds and new equipment, use the 568B. But if your interest is just a basic network standard supporting proper cabling functions, go for your preference.

In instances that call for upgrading or expanding a current network, it is advisable to continue using the same wiring scheme. Repeat the same wiring if there is an already existing voice or data wiring and you require a new connection. For federal contracts and installations within a residential setting, always use the 568A because it is a government requirement.

Although 568A and 568B are similarly used to offer a wiring scheme to terminate the Ethernet cable and transmit data, they have slight differences, which should not worry you. Just pick one and stick to it. If you find it challenging, it is recommended to go for the 568B wiring standard. Most people extensively use it due to its compatibility and effectiveness, and it also meets current and future requirements.

There is no technical advantage of 568A over 568B. Both standards focus on establishing relevant practices that enable effective communications and networking. Also, the design and installation of their cabling systems intend to serve various current and future services.

  1. Remee Products EIA/TIA-568A Cable EIATIA568A

  2. Remee Products EIA/TIA-568A Cable EIATIA568A


    • 8-pin male to 9-pin female
    • Multi-LAN data patch cord
    • Excellent choice for standard applications
    • 568A cabling has a ten-year lifespan

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    05/30/2023 08:51 pm GMT
  3. CSA TIA/EIA-568-B.2-1 Cable

  4. CSA TIA/EIA-568-B.2-1 Cable


    • Cable length is 12 inches
    • Up-to-date and a broad choice wiring scheme
    • Cabling standard 568B has a ten-year lifespan
    • Backward compatible with the USOC wiring scheme

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    05/30/2023 08:51 pm GMT

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