In Moving forward on VOIP, Kevin Werbach says he's worried about trying to distinguish VOIP regulations based on the nature of the network (private, public, etc). I'll go a step farther than Kevin and state flat out that this makes no sense. Firewalls and distinctions between networks is not a feature - it's a problem that messes things up every day. It's all IP (is Voice Over IP for heaven's sake) so it is one network. Any arbitrary distinctions will be worked around immediately.