about dtmf, it is equal to rfc2833 for both zoiper. Advanced Setting reports SIP canrenivite (directmedia) = yes, on Elastix GUI canreinvite is reported for every extension and it’s set to yes. I’m using Elastix.
About version and release taken from Elastix:
FreePBX
freePBX 2.11.0 17
Asterisk
asterisk 11.17.1 1
asterisk-perl 1.03 0
asterisk-addons 11.17.1 1
Now my question would be: Supposing PBX is a new fresh install, how to configure it to have direct media between endpoints?
regards