We have the Mitel 3300ICP/200ICP, and the Nortel Succession/BCM (pthwew ... I still have a hard time saying that word, Nortel).
The Nortel line is new to our organization. We are one of 14 National VARs (or so I am told). I myself still focus on our Mitel line and after 20 years of downplaying the Nortel against our Mitel portfolio, it is hard to make that about face comfortably. It will happen though ... I'm sure.
By fully VoIP, I meant I have systems that utilize only VoIP endpoints and not the TDM components often appended in many of our current migrations.