Why Your Cat 6 Cables May Fail to Connect With Your In-Wall Wiring and How to Fix It


I have a problem with using cat 6 cables in my house. The house has in-wall cat 6 wiring, but when I connect any cat 6 cable from the wall to the hub, there is no network connection. However, when I use a cat 5e cable instead, the connection works fine. This happens with all the cat 6 cables I have tried. What could be the reason for this issue and how can I fix it?


Why Cat 6 Cables May Not Work With In-Wall Cat 6 Wiring

Cat 6 cables are designed to support higher bandwidth and faster data transfer than cat 5e cables. They are also more resistant to crosstalk and interference, thanks to their tighter twists and thicker insulation. However, these advantages come with some trade-offs, such as higher cost, lower flexibility, and stricter installation requirements. In some cases, using cat 6 cables may not work with existing in-wall cat 6 wiring, resulting in no network connection or poor performance. This article will explain some of the possible reasons for this problem and how to fix it.

One of the most common reasons for cat 6 cables not working with in-wall cat 6 wiring is that they are not following the same standard. There are two main standards for cat 6 cables: T568A and T568B. These standards specify the order of the eight wires inside the cable and how they are connected to the RJ45 connector. The difference between the two standards is that the positions of the green and orange pairs are swapped. For example, the T568A standard has the following order: white-green, green, white-orange, blue, white-blue, orange, white-brown, brown. The T568B standard has the following order: white-orange, orange, white-green, blue, white-blue, green, white-brown, brown.

If the in-wall cat 6 wiring follows one standard and the cat 6 cables follow another, then the wires will not match up correctly at the ends, causing a loss of signal or a short circuit. To avoid this problem, it is important to check the labels on the cables and the wall jacks and make sure they are consistent. If they are not, then either the cables or the wall jacks need to be replaced or rewired to match the same standard.

Reason 2: Damaged or Poor Quality Cables

Another possible reason for cat 6 cables not working with in-wall cat 6 wiring is that the cables are damaged or of poor quality. Cat 6 cables are more sensitive to physical stress and environmental factors than cat 5e cables, due to their higher frequency and tighter specifications. Any bends, kinks, cuts, or nicks on the cable can affect its performance and integrity. Similarly, any exposure to moisture, heat, dust, or electromagnetic interference can degrade the signal quality and cause errors or interruptions.

To prevent this problem, it is advisable to use high-quality cat 6 cables that meet the industry standards and have proper shielding and insulation. It is also important to inspect the cables regularly and replace them if they show any signs of damage or wear. Additionally, it is recommended to avoid running the cables near sources of heat, moisture, or interference, such as power lines, appliances, or fluorescent lights. The cables should also be routed carefully and securely, avoiding sharp bends or twists that could damage the wires.

Reason 3: Incompatible or Faulty Devices

A third possible reason for cat 6 cables not working with in-wall cat 6 wiring is that the devices connected to the network are incompatible or faulty. Cat 6 cables can support speeds of up to 10 Gbps, but this also depends on the capabilities of the devices and the network equipment. For example, if the hub, router, switch, or network card only supports speeds of up to 1 Gbps, then using cat 6 cables will not make any difference. Similarly, if the devices or the network equipment are malfunctioning, outdated, or misconfigured, then they may not recognize or communicate with the cat 6 cables properly.

To solve this problem, it is necessary to check the specifications and the status of the devices and the network equipment and make sure they are compatible and working correctly. If they are not, then they may need to be updated, repaired, replaced, or reconfigured to match the requirements of the cat 6 cables and the network.


Cat 6 cables are a great choice for improving the speed and reliability of the network, but they also come with some challenges and limitations. Sometimes, using cat 6 cables may not work with existing in-wall cat 6 wiring, due to various reasons such as mismatched standards, damaged or poor quality cables, or incompatible or faulty devices. To fix this problem, it is essential to identify the root cause and take the appropriate actions to ensure the compatibility and functionality of the cat 6 cables and the network. By doing so, the network performance and user experience can be enhanced and optimized.

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