[Freeswitch-users] G729 ptime mismatch on ingress and egress legs

Hi I am trying to configure FS as a B2BUA which can do ptime conversions between the ingress and egress leg. The question is, if both legs have G729 as the codec but ptime 20 on one and 30 on another, would i still need to get the licensed mod_com_g729 or can it work with the passthrough mod_g729. I already tried it out, but it doesnt seem to work. Is there some configuration needed for this ? -- Thegrid