@OregonVoIP,

As general description, you are absolutely correct. However, if somebody has typical residential DSL account (that is, phone + DSL), switching phone to VOIP easily becomes a mess (especially, if you are doing it for the first time - as most people do). And having general knowledge hardly helps.

You can't switch to dry-loop DSL while you retain your phone number - your phone company just won't do it. And you can't switch your phone number to VSP, since there is "additional service" (namely, DSL) associated with it.

I did such switch twice - and in both cases I ended switching my Internet service to cable company.