I have laid approx. 75m insulated CAT 5 cable to connect a computer at the other end of the workshop to our office network hub (UNEX Nexhub 8 port 10/100M).
I have put RJ45 connectors on both ends of the cable and they are both wired exactly the same (straight through).
When I plug the ends in (one in the computer and the other in a port on the hub) the light on the hub for that port goes green (for 100m connection), but then flashes orange twice (orange = 10m), goes off, and then repeats. When the light goes off, the ACT light flashes briefly each time. (Does this mean the hub is trying 100m and then tries 10m and as that fails it rests and then tries again continously?)
I guess this means that there is some sort of connection happening - just a bad one for some reason.
I have tried putting new RJ 45 plugs on and double checking etc (as well as another network card and trying other ports on the hub) and still same problem.
I would appreciate any ideas on the sort of problems that could cause this bad connection and any potential solutions.
Thanks for your help