Dear ALL,<br><br>Thats my first post here. I am struggling for some time with DTMF issue.<br>Let me introduce you my configuration.<br><br>The main task is to configure RTP Proxy with full topology hiding - OPERATOR_1 ------- Freeswitch ------- OPERATOR_2<br>




Here is a prt of my config:<br>- sip profile.<br>I have one new sip profile with two gateways (OPERATOR_1 and OPERATOR_2)<br>&lt;include&gt;<br>  &lt;gateway name=&quot;OP1&quot;&gt;<br>    &lt;param name=&quot;username&quot; value=&quot;X1.Y1.V1.Z1&quot;/&gt;<br>




    &lt;param name=&quot;password&quot; value=&quot;09321234&quot;/&gt;<br>    &lt;param name=&quot;proxy&quot; value=&quot;X1.Y1.V1.Z1&quot;/&gt;<br>    &lt;param name=&quot;from-domain&quot; value=&quot;<a href="http://test.com/" target="_blank">test.com</a>&quot;/&gt;<br>




    &lt;param name=&quot;register&quot; value=&quot;false&quot;/&gt;<br>    &lt;param name=&quot;caller-id-in-from&quot; value=&quot;true&quot;/&gt;<br>    &lt;param name=&quot;extension&quot; value=&quot;test&quot;/&gt;<br>




    &lt;param name=&quot;extension-in-contact&quot; value=&quot;true&quot;/&gt;<br>    &lt;param name=&quot;outbound-codec-prefs&quot; value=&quot;$${outbound_codec_<div>prefs}&quot;/&gt;<br>    &lt;param name=&quot;disable-transcoding&quot; value=&quot;true&quot;/&gt;<br>




    &lt;param name=&quot;inbound-late-negotiation&quot; value=&quot;true&quot;/&gt;<br>  &lt;/gateway&gt;<br>&lt;/include&gt;<br><br>- dialplan<br>&lt;include&gt;<br>  &lt;context name=&quot;public&quot;&gt;<br>        &lt;extension name=&quot;term&quot;&gt;<br>




                &lt;condition field=&quot;network_addr&quot; expression=&quot;^(X1\.Y1\.V1\.Z1|X2\.Y2\.V1\.Z1)$&quot; break=&quot;on-false&quot;/&gt;<br>                &lt;condition field=&quot;destination_number&quot; expression=&quot;^46(\d{9})$&quot;&gt;<br>




                &lt;action application=&quot;set&quot; data=&quot;proxy_media=true&quot;/&gt;<br>                &lt;action application=&quot;set&quot; data=&quot;bypass_media=false&quot;/&gt;<br>                &lt;action application=&quot;start_dtmf&quot;/&gt;<br>




                &lt;action application=&quot;bridge&quot; data=&quot;sofia/gateway/OP1/$0&quot;/&gt;<br>                &lt;/condition&gt;<br>        &lt;/extension&gt;<br>  &lt;/context&gt;<br>&lt;/include&gt;<br><br>Everything is fine, but i have problem with DTMF conversion from RFC2833 to inband.<br>




Refering to <a href="http://wiki.freeswitch.org/wiki/Misc._Dialplan_Tools_start_dtmf" target="_blank">http://wiki.freeswitch.org/wiki/Misc._Dialplan_Tools_start_dtmf</a> and <a href="http://wiki.freeswitch.org/wiki/Proxy_Media" target="_blank">http://wiki.freeswitch.org/wiki/Proxy_Media</a> i have done all the necessary things.<br>




<br>vars.xml<br>  &lt;X-PRE-PROCESS cmd=&quot;set&quot; data=&quot;global_codec_prefs=PCMA,G.729,PCMU,GSM&quot;/&gt;<br>  &lt;X-PRE-PROCESS cmd=&quot;set&quot; data=&quot;outbound_codec_prefs=PCMA,G.729,PCMU,GSM&quot;/&gt;<br>



<br>The after-effect is following output:<br>[ERR] switch_core_io.c:1055 Codec PROXY PASS-THROUGH encoder error!<br><br>Placing  &lt;param name=&quot;dtmf-type&quot; value=&quot;none&quot;/&gt; does not help anyway.<br><br>


Could sb point me where the problem is located?<br><br>Thanks in advance,<br><font color="#888888">Mac</font></div>