I appreciate this message refers to a very old post, but I have EXACTLY
the same problem and would love to know if you got this fixed in the end
and how ?
Basically Cisco gateway not sending DTMF events to the ISDN when
they are received by RFC2833 however do get sent when received by SIP
INFO.
[original post]
http://lists.freeswitch.org/pipermail/freeswitch-users/2009-December/050780.html
Thanks
Bernie