I have a trunk that auth by IP so
in FS I set auth like
 
 <param name="register" value="false" />
 
butt ping in log show
[WARNING] sofia.c:4028 Ping failed trunk_3 with code 408 - count -1/-1/1, state DOWN
 
however FS is using this trunk without any problem.
is it a normal message behavior ?
 
Thanks