Nope. It's an analogue line that comes out of a socket on the wall. It's provided by the cable company, but it's not cable-based, it just runs in the same wiring trough. Other than that it's functionally the same as any other analogue PSTN phone line provided by BT for the last 50 years. There's no interlink with any IP based system accessible to me, although I have no doubt that once it gets back to the exchange it turns into a VOIP system of some sort.

pca