Hello, I¹ve posted on the question on this topic before but I¹ll try again with more detail. I have this svn version FreeSWITCH Version 1.0.trunk (16952) SIP provider: Bandwidth.com I¹m assuming that DTMF rc2833 is the default, but I can¹t get my ivr to recognize the incoming call tones. Bandwidth can set up either inband or RC2833. They require these codecs, G.711Ulaw and G.729A. The tech at Bandwidth wanted me to setup inband to test if that works better, but wasn¹t sure where to set it up. I added this to my dialplan <extension name="main_number_23" continue="true"> <condition field="destination_number" expression="^3000$"> <action application="answer"/> <action application="start_dtmf"/> <action application="sleep" data="1000"/> <action application="conference" data="conference_1@conference_1"/> </condition> </extension> Should I add it to my sip trunk? Not sure how to troubleshoot this issue Thanks Sean