I installed a POS today. The network is usually a server (does the IP configuring) connected to a switch near the server and the POS connects to that switch and could be located just about anywhere. This specific POS is approximately 75 feet from server and switch. I ran a cat 6 cable, terminated it on both ends per usual, connected one end at switch and other end to POS. Noticed I was getting no activity at switch or POS Ethernet port. The cable checks good and shows that all 8 wires are in correct order, the weird thing is that if I put another switch at the POS both switches immediately start communicating, and when I connect the POS to that switch the POS gets a connection and communicates with server. Does anyone have any idea what could be causing this issue?