I tried 5 times to connect them to Cat6 cable. I have one to make some sort of connection that only gave me a 100Mbps connection on the line. The lines are good. Can't get the connection to work. rejection of them. Obtaining pass-through connectors. The instructions are so small and the plastic part that fits into the plug is cheap. Wasted my money on them! This is an update of my previous review. I'm glad this company stands behind what they sell. They contacted me and apologized that the product is not working. They refunded my money for it too! I bought these a few months ago and have just started using them. Most companies would say yes, sadly it wasn't! They refunded my money! Thanks for that!