I have an unused Comcast high-speed internet self-install kit from 2006. It has two coils of extension cable, and a splitter, and some screws.
The name of the cable is "extension cable" printed on the package. I wonder if that is its actual name?
As ethernet cables are always useful, I wonder if the extension cables are totally worthless and should be tossed into a trash can?
Or are they usable for some other purposes, or even sellable?
SVI Digital SV-2G Splitter (5/1000MHz):
One interface of the cables: