Hi TGamer

So I see you are in Australia and I am in UK, so we are going to get some time delay between responses, but I'm very keen to solve this issue for you

you said the hub was a known working one. I see from an edit that I think this is a possibly a modem router. If it is indeed working that should still be fine

if you said it was working then I'm guessing you had at least 2 pcs connected to it that were able to talk to each other

if that's the case, please try connecting 2 of the 4 new pcs we are trying to link together, using the same cables as were used to connect the original pcs to the modem router

see if you get the NIC link lights up on pc and router

one step at a time is the best way here. I don't think you should need the phone line in the wall for the router part to work - why I think that is if the phone line has a temporary fault, it wouldnt stop the router functionality, you'd just lose internet, so I think we are good without worrying about that

let me know how you get on or any other thoughts. It's bed time here, but I'll check back in in the morning GMT