[Freeswitch-users] Bad sound with crackle

[Loïc]

 Hello,

 I am a new user of FreeSwitch and I try to switch from Asterisk to 
 FreeSwitch.

 For now, I just registered a SIP line and I made an extension in the 
 dialplan to playback music on hold when I call :

 <context name="default">

     <extension name="test">
       <condition>
         <!--<condition field="destination_number" 
 expression="^9000$">-->
         <action application="answer"/>
         <action application="playback" data="$${hold_music}"/>
       </condition>
     </extension>

 </context>

 When I call I have a problem with the sound, it is very bad, I hear 
 very fast crackle.
 On the console I can see a warning during my call and that's all:

 2010-11-12 13:02:45.119517 [NOTICE] switch_channel.c:784 New Channel 
 sofia/external/anonymous at anonymous.invalid 
 [c27034e2-ee54-11df-ad91-7fc19b304698]
 2010-11-12 13:02:45.122548 [INFO] mod_dialplan_xml.c:331 Processing 
 Anonymous <anonymous>->test in context default
 2010-11-12 13:02:45.125555 [NOTICE] mod_dptools.c:920 Channel 
 [sofia/external/anonymous at anonymous.invalid] has been answered
 2010-11-12 13:02:45.508790 [WARNING] mod_sofia.c:1036 Asynchronous 
 PTIME not supported, changing our end from 30 to 20

 If I add <X-PRE-PROCESS cmd="set" data="timer_name=soft"/> in vars.xml, 
 when I call the sound is good but I still get the warning :

 2010-11-12 13:05:42.789161 [NOTICE] switch_channel.c:784 New Channel 
 sofia/external/anonymous at anonymous.invalid 
 [2c565760-ee55-11df-a0d9-0f91e325cd76]
 2010-11-12 13:05:42.791179 [INFO] mod_dialplan_xml.c:331 Processing 
 Anonymous <anonymous>->test in context default
 2010-11-12 13:05:42.794179 [NOTICE] mod_dptools.c:920 Channel 
 [sofia/external/anonymous at anonymous.invalid] has been answered
 2010-11-12 13:05:43.174443 [WARNING] mod_sofia.c:1036 Asynchronous 
 PTIME not supported, changing our end from 30 to 20
 2010-11-12 13:05:43.175461 [INFO] sofia.c:709 
 sofia/external/anonymous at anonymous.invalid Update Callee ID to 
 "anonymous" <anonymous>

 Is this normal?
 Why should I add this line in vars.xml for it to work ?
 What does this warning? How to solve it?

 Thank you in advance for your help.


 Loïc