Sin97525

Thank you everyone for replying. I have been doing some diagnostic for the past 2 days and have switched to a 15m cat6 cable. Now a new problem comes, I'm not getting 1Gbps connection, but only 100Mbps. I even tried it with other computers. The router is compatible with gigabit connection and other devices that are connected to it(using other cables, all cat5e) are getting 1Gbps. I'm really starting to think that the router is the problem, but I still can't see why is that. With cat5e I'm not getting connection at all and with cat6 cable I only get 100Mbps. In fact the 15m cat5e cable is industrial grade ethernet cable that I got from my workplace, and it is working if I directly connect the modem to my PC, so quality shouldn't be a problem. Any new thoughts on this?

I recently built a PC and would like to use Ethernet connection on the second floor, so I ran a 15 meters Ethernet cable to connect to the router at the basement, but I'm not getting any connection. My setup was this: modem -> router -> 15m cable(cat 5e) -> second floor -> PC With this setup, I don't get any connection through the cable. I have checked with another desktop computer and 2 other laptops and they all resulted in the same thing; windows either say network cable unplugged or unidentified network if it recognizes the cable. I then changed the setup to this: modem -> 15m cable -> second floor -> router -> PC And now everything is working, I get full speed and everything is perfectly fine, but I can't put the router on second floor since I have other things(server, other computers) connected to the router via Ethernet at the basement. I also tried directly connect the PC to the modem with the 15m cable and that also worked. Now it seems to me that the problem comes from the router, but I'm not sure what the problem is. I was thinking it may have to do with resistance, but that shouldn't be a problem since 15m isn't that long. Any thoughts guys? I really need help on this. P.S. router model is Linksys ac1600