Hi All.

I was having a problem configuring a vono provider into my FreeSWITCH.
Now its working.
If someone had the same problem as me, here it's configuration.

In external.xml file, insert the below line into settings:
<param name="user-agent-string" value="FreeSWITCH Agent"/>

Somehow, Vono Provider wont accept the default string that FreeSWITCH send.
ex: FreeSWITCH-mod_sofia/1.0.head-git-db5f504 2011-07-17 17-00-38 -0400.

and then, the vono.xml file:

<include>
   <gateway name="vono">
     <param name="username" value="[USERNAME]"/>
     <param name="realm" value="vono.net.br <http://vono.net.br> "/>
     <param name="password" value="[PASSWORD]"/>
     <param name="caller-id-in-from" value="false"/>
     <param name="extension" value="[USERNAME]"/>
     <param name="extension-in-contact" value="true"/>
     <param name="proxy" value="vono.net.br <http://vono.net.br> "/>
     <param name="register-proxy" value="201.86.87.2"/>
     <param name="expire-seconds" value="3600"/>
     <param name="register" value="true"/>
   </gateway>
</include>

Hope it helps someone.