What is the call path, and why do you have to use inband?  Have you tried the spandsp dtmf detector?

On Feb 19, 2014, at 2:53 AM, Yigal Rachilevsky <yigalr01@gmail.com> wrote:

Hello !

I am a new in Freeswitch..
I need a help with start_dtmf parameter

We have IVR system (Telephone Reporting System)
Some times in incoming calls Freeswitch misses some key presses (DTMF)
I guess that the problem is the detection of DTMF...
I use in (external.xml)
<param name="dtmf-type" value="rfc2833"/>

Where I need to add start_dtmf parameter for detecting in-band DTMF ?
We are using  dialplan.xml file located in root of conf folder
<?xml version="1.0" encoding="utf-8"?>
<include>
  <context name="public">
  <extension name="SYFreeSwitch">
  <condition field="destination_number" expression=".*">
<action application="start_dtmf" />
  <action application="managed" data="SYFreeSwitch"/>
  </condition>
  </extension>
  </context>

</include>

It's right place for it ?