The best way to mesh EAP Access Points models specially EAP620 HD is to have it connected via ethernet cable to the router rather than wirelessly. 

Connecting EAP access points like the EAP620 HD via Ethernet cable to the router can indeed provide several advantages over wireless meshing:

1. Stability: Ethernet connections typically offer more stable and consistent connectivity compared to wireless connections. This stability can result in better overall network performance, especially in environments with high traffic or interference.

2. Bandwidth: Wired connections generally provide higher bandwidth compared to wireless connections, which can be beneficial for applications that require high data throughput, such as streaming media or transferring large files.

3. Reduced Interference: Wired connections are not susceptible to the same interference issues that can affect wireless connections, such as signal degradation from physical obstacles or other electronic devices. This can lead to more reliable and predictable network performance.

4. Scalability: Ethernet-connected access points can be easier to scale and manage in larger deployments. With a wired backbone, you can add additional access points without worrying about signal degradation or coverage issues that may occur in wireless mesh networks.

5. Security: Wired connections can be more secure than wireless connections, as they are not susceptible to wireless eavesdropping or unauthorized access from nearby devices. This can be particularly important for sensitive environments or applications that require strict security measures.

Overall, while wireless meshing can be convenient in certain situations, especially where running Ethernet cables is impractical, connecting EAP access points like the EAP620 HD via Ethernet cable to the router can provide better performance, reliability, and security in many cases.

Note: Wireless Mesh with this model is not advisable.