Questionable home internet installationLocked
I am a journeyman electrician but I do mostly industrial work so I don’t have much knowledge with home WiFi. My in-laws internet doesn’t work very well and they told me that the internet provider used their old phone line as the Ethernet cable in their house. I brought some cat 6e and was gonna pull a better wire from their box outside but I found that from the pole to the house they only used one pair out of the cable and only one pair from there into the house. Is it normal for an internet provider to only use one pair? And does an old telephone line suffice as an Ethernet cable or should that be replaced anyways? Help me out IT guys.