Our setup at the moment is the following:
We have 2x Avaya Integral 55 PRI with about 150 ISDN Phones (most of them Avaya Integral T3.11) and about 10 Faxes. We are thinking about switching to an Asterisk PBX, but have not much experience with it, except for setting up an Asterisk with a couple of smartphones via WiFi for fun.
Since we do not want to sell our 150 ISDN Phones worth 15000 $ I wanted to ask if anyone has experience in connecting an Asterisk PBX with these Avaya Phones or generally in migrating from Avaya to Asterisk!
Thanks in advance!
Best regards, Chris