It's a system NEC puts out (old Nitsuko) for the general public to buy and install. Panasonic and Vodavi have been doing it for years. Why I have a problem of someone complaining about posting pricing is that you don't even have to be certified to use it. It's like posting the cost of jack inserts between Graybar and Home Depot. If the local Joe thinks he can install it and get it done God Bless them...I am sure we all will charge the correct amount after it's screwed up. I was rather pissed when I first saw the DS phones because they look VERY simular to the i-series. But, the system is more like an onyx than an i-series.