opinion and poor memory based info… IIRC 3cx was just some shit until they acquired elastix. elastix was an asterisk based system. the product you know as 3cx now is rebranded elastix with 5 years or so of updates. They claim to be an asterisk alternative, but they obviously have asterisk roots. How much of that remains, i dont know. I’ve always considered it a clever front end with numerous modules for asterisk. There is nothing you can do with 3cx that you cant do in asterisk, it just takes a TON more work.
similarly, freepbx is a frontend for asterisk that makes maintenance easier and adds clever modules.
I’ve been working with asterisk since 2002 so i may muddle some details here and there, but the foundations remain the same.
some interesting info courtesy of wikipedia (sadly the interesting arguments on the piaf forums were all deleted by the 3cx overlords)
