Tell your phone to stop sending INFO and 2833 at the same time and the problem will stop.  

/b

On Mar 23, 2009, at 4:17 AM, zhaoxxqq wrote:

HI, friend,
I added <param name="dtmf-type" value="rfc2833" /> to my sip profile in external , like below.
 <gateway name="vos3000">
   <param name="username" value="anything"/>-->
  <param name="realm" value="221.192.133.51"/>
  <param name="password" value="anything"/>
  <param name="dtmf-type" value="rfc2833" />
  <param name="extension" value="87263150"/>
  <param name="register" value="false"/>
  </gateway>
 
but. the problem is still exist. Can you help me.
 
Zhao Xiaoqiang