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Probably not....I am not sure! I also did not see any special markings, but I will check again.

btw - there are telephone sockets at the 1st floor for DSL connectivity. But the cable shown in the pic is not connected to this telephone socket.

Using this cable I MUST transmit Ethernet connectivity from the cellar to the roof floor. The router is located at the celler/basement. I am installing a Patch panel and linking the wires. I do not want to WiFi repeaters.

The cable pic shown runs through the walls, and end up at an RJ45 socket at the roof-floor.

What should I do?