Glacier, I think you are speaking for yourself and your location. My experience here is that no cable company is capable of providing service to businesses, at least those needing more than a few lines. Even with residential they do a horrible job.
You may be basing your opinion on equipment from Arris and others who have some decent products for providing voice service. Matter of fact the
TM-512 EMTA which is what's in that picture is what Cablevision should be using. 12 lines on a RJ-21.
Do you guys throw a Motorola Surfboard modem on the floor behind somebodies computer, plug it into the phone with a bridging adapter, go outside and cut the wiring off the telco NID and walk away?
-Hal