I’ve got around 40 Ethernet cables bunched together. They’re sticking out of a wall in a basement room. Their ends are cut, so there are no connectors on them.
All of them lead to endpoints elsewhere in a large building. Two of those endpoints I have access to. At those points, the cables end in female RJ45 sockets.
I would like to find out which cables in the basement lead to those two endpoints. Once I know this, I’d like to connect those two cables to establish a connection between the two aforementioned endpoints elsewhere in the building.
I have several devices I could connect to one or both of the two endpoints, including laptops and a router.
I do not currently own or have easy access to a multimeter or any even more sophisticated tools. I do have batteries and a phase tester.
I’m looking for an easy way to identify the right cables without having to strip the isolation off countless cables or even connecting RJ45 connectors to the cables one by one until I hit gold. I’d like to avoid purchasing tools I might never need again.
It occurred to me that applying an electric current to the endpoints of the two cables and then checking on which of the cables in the basement I can detect the current with a phase tester might work. However, I am unsure about how to safely (!) do this.
Any help would be much appreciated.
I found this question to be asking for something similar, but the solutions offered seem to not transfer to my issue