Look at the old mandates that require the firms we used to call telephone companies to maintain their copper-wire phone lines and voice-call switching infrastructure.
Consumers are also switching to Voice-over-Internet Protocol (VoIP), which after years of talk is so tested and proven that even you've begun to grudgingly sell it.
It was then piped back to Choice One's own switching office where the Internet traffic was sent to the Internet and the voice was converted and dropped onto the regular phone network.