Hi Doc, Harold,
Read your post, sounds like you are in good shape for now.
I will look into this further, no hurry.
I did not know ATnT had their fingers so deep in the "local service" pot.
I have Verizon but doing a search seems I can also get ATnT. So, I have no idea who maintains the lines etc. etc.
Will look into it because I am curious as well. Doubt it is something that will cause you any grief for some time.
Lee