IP-enabled voice service
(4) IP- enabled voice service .— The term “IP-enabled voice service” means the provision of real-time voice communications offered to the public, or such class of users as to be effectively available to the public, transmitted through customer premises equipment using TCP/IP protocol, or a successor protocol, (whether part of a bundle of services or separately) with interconnection capability such that the service can originate traffic to, or terminate traffic from, the public switched telephone network, or a successor network.