nortel as the end-user, we started moving aggressively to shoretel a few years ago after Nortel became too expensive to upgrade vs. purchasing newer technology. still have a dozen+ Nortel systems, though, that we haven't replaced yet. from my perspective as the hands-on guy, they just work and work and work. and it's been a great career installing and supporting the equipment and users.
real shame, what's happening, if not criminal. but, that's probably part of a different thread.
I can imagine there's plenty of product available for the short/mid -term, but going to be interesting to see how the product evolves, assuming a viable purchaser is found.