I am trying to design a FreePBX system for about 400 extensions. A large proportion of those extensions will be analog, via 32port fxs gateway devices (13 of them to be exact), with just a few SIP phones. I cannot imagine them to have more than 100-150 concurrent calls.
My question is, what kind of server should I take into consideration?
I was thinking about Xeon 16core processor and 32GB of RAM. It’s important to note, that it will be a BASIC fixed telephony system - no bells and whistles like even call recording.
Thank you all.