I just visited a fast growing company hoping to tell them all about IP telephony, and it turns out that they already have some of the most recent Avaya IP systems. Still, there is some potential work to offer them, interconnecting their system with other companies', sharing networks and POPs, etc. The thing about Avaya is that I am familiar with their older systems (Definity) but I wonder just how much interoperability they offer now.
General comments are most welcome, but for a more specific question, how's this one: can I buy an Avaya IP phone by itself? How well (or bad) will it work with Asterisk?
TIA,
-Ramon