Callcentric does have lots (and lots and lots - anybody wants to buy some lightly used SIP gear?
I'm really kidding, we don't sell any gear) of ATAs on shelves. Yes, we do have 3CX servers installed - our support engineers are in touch with 3CX, but that "touch" is not in a real time and doesn't happen momentarily.
Our support people are frequent lurkers on this forum - they surely read this thread too.
Tomorrow we're closed due to observing Veteran's day holiday, but at Tuesday we may hear something from or post something to, 3CX, but I'm not in charge of those conversations (I'll keep my evil eye on them though