Hi, what do I have to do to get RFC2833 DTMF passed to the client in an inbound scenario like this: Upstream >rfc2833> FreeSWITCH >rfc2833> Asterisk ? The Upstream is sending the DTMF tones correctly: --- 329 2.114845 UPSTREAMIP FS_IP RTP EVENT 62 Payload type=RTP Event, DTMF Eight 8 --- FreeSWITCH isn't logging much of the dtmf stuff, even with loglevel debug: http://pastebin.freeswitch.org/15541 ... Set 2833 dtmf receive payload to 101 ... 2011-03-03 23:29:59.498466 [ERR] switch_rtp.c:282 Failed DTMF sanity check. ... User's directory entry includes: <param name="dtmf-type" value="rfc2833"/> <param name="pass-rfc2833" value="true"/> I tried adding those in the gateway profile as well, no change. On the asterisk box I don't see those rtpevents in the pcap trace anymore, they just vanish on the FS box. Can somebody help me out here? Or point me to the right wiki page? http://wiki.freeswitch.org/wiki/Sofia_Configuration_Files#DTMF doesn't really tell me, what the options do and http://wiki.freeswitch.org/wiki/DTMF is something different. Thanks and bye, Johannes