3CX acquired PBX in a Flash and also Elastix. Elastix claims that v4 has code issues with FreePBX and FreePBX denies they are pushing. 3CX withdraw the v4 of Sourceforge. Now if you install Elastix 5 it does not have even the Elastix logo (the same with PBX in a flash) It has the logo of 3CX. It is 3CX and it is not even asterisk based.