Had a sparky do a cable run for us recently, which we know is over 100m in length. The cable has been ran, terminated and tested using one of these basic testers - which shows all the pairs as being good and passes. Whenever we try using the cable though, it just doesn't work and at this stage I'm fairly confident it's probably due to the cable being over 100m. 1. I'm guessing these very basic testers pretty much just check for continuity and would work on runs much longer than 100m? Which is why it shows as a "pass" when the cable is too long for data? 2. The cable isn't excessively over 100m, it was estimated to be about 120-130m. We figured we would perhaps just end up with a slightly slower link, or with Ethernet is it just good up until a certain point and then it will fail completely? 3. What would be the cheapest/easiest way to get the run working? Could we just stick cheap switch in the middle so it would be like 2 x 60m cables? The cable run is intended to connect an NBN HFC modem in the MDF to a VDSL modem in the office via the WAN port - so link speed isn't an issue at all - the WAN link is only 15Mbit. Any help much appreciated.