This was sort of a terminological failure on my part... When I say analog I am including typical digital PABXs. Now that's somewhat fair because a number of sma

This was sort of a terminological failure on my part... When I say analog I am including typical digital PABXs. Now that's somewhat fair because a number of small and medium business "digital" PABXs used digital signaling and analog audio, especially key systems. But there were plenty of entirely digital systems, and of course ISDN had decent popularity in large institutional contexts. I'm not sure what a great term is to encompass all of these systems besides "non-IP." But on the small business end, most businesses are doing just that right now... Going from one or two analog lines to a cloud managed IP solution.