Dear ALL, Thats my first post here. I am struggling for some time with DTMF issue. Let me introduce you my configuration. The main task is to configure RTP Proxy with full topology hiding - OPERATOR_1 ------- Freeswitch ------- OPERATOR_2 Here is a prt of my config: - sip profile. I have one new sip profile with two gateways (OPERATOR_1 and OPERATOR_2) <include> <gateway name="OP1"> <param name="username" value="X1.Y1.V1.Z1"/> <param name="password" value="09321234"/> <param name="proxy" value="X1.Y1.V1.Z1"/> <param name="from-domain" value="test.com"/> <param name="register" value="false"/> <param name="caller-id-in-from" value="true"/> <param name="extension" value="test"/> <param name="extension-in-contact" value="true"/> <param name="outbound-codec-prefs" value="$${outbound_codec_prefs}"/> <param name="disable-transcoding" value="true"/> <param name="inbound-late-negotiation" value="true"/> </gateway> </include> - dialplan <include> <context name="public"> <extension name="term"> <condition field="network_addr" expression="^(X1\.Y1\.V1\.Z1|X2\.Y2\.V1\.Z1)$" break="on-false"/> <condition field="destination_number" expression="^46(\d{9})$"> <action application="set" data="proxy_media=true"/> <action application="set" data="bypass_media=false"/> <action application="start_dtmf"/> <action application="bridge" data="sofia/gateway/OP1/$0"/> </condition> </extension> </context> </include> Everything is fine, but i have problem with DTMF conversion from RFC2833 to inband. Refering to http://wiki.freeswitch.org/wiki/Misc._Dialplan_Tools_start_dtmfand http://wiki.freeswitch.org/wiki/Proxy_Media i have done all the necessary things. vars.xml <X-PRE-PROCESS cmd="set" data="global_codec_prefs=PCMA,G.729,PCMU,GSM"/> <X-PRE-PROCESS cmd="set" data="outbound_codec_prefs=PCMA,G.729,PCMU,GSM"/> Placing <param name="dtmf-type" value="none"/> does not help anyway. Could sb point me where the problem is located? Thanks in advance, Mac