Hello,
I have the following topology:
IPphones <-> IPBX-1 <-> <-> IPBX-A <-> IPphones IPphones <-> IPBX-2 <-> KAMAILIO <-> IPBX-B <-> IPphones ... IPphones <-> IPBX-N <-> IPBX-X <-> IPphones
version: kamailio 1.4.1-notls (i386/linux)
I experienced problems regarding DTMF digits transport. DTMF is transported through RTP data and it is not recognized at the end.
Does anyone could recommend me how to force the negotiation between Kamailio and IPBXs to be sure that IPphones and IPBXs will use another method to transport DTMF (like OOB SIP INFO or RFC2833)
Many thanks, Simon