Question about TP-Link TL-WPA7617 KIT (CH)

There are helpful installation videos for setting up and troubleshooting your powerline adapter that show you step by step how to connect and configure the devices correctly. You can find an example video on setting up a TP-Link powerline adapter on YouTube, which explains the connection via sockets, describes the adapter pairing and gives tips on how to avoid sources of interference such as multiple sockets or devices such as fridges.

It is important that both adapters are on the same circuit and are plugged directly into wall sockets, not power strips. If the connection does not work in the basement, it may be due to the distance, the circuit or sources of interference. Try placing the adapters closer together or in other sockets and restarting the automatic pairing.

Another video shows how to extend the Wi-Fi via Powerline and how to configure the Wi-Fi via WPS, which may also be relevant for your model.

You can also find a product page on the official TP-Link website with further information on using and setting up the adapter.

These videos and instructions should help you to establish the connection in the basement and successfully complete the installation.