Re: [SR-Users] TM module timer question - sr-users

28 Jun 2012

Thanks guys for the info.

Will try again and keep on it.

Rgds,

Gertjan

On 6/28/12 08:55:27 AM Daniel-Constantin Mierla wrote;

Hello,

On 6/27/12 6:08 PM, Corey Edwards wrote:

...
  On 06/26/2012 08:36 AM, Gertjan Wolzak wrote: 
...
 > Which timer do I need to use to get a failure
route to reroute the  
...
 > call to a pstn gateway? 
...
 >  
...
 >    
...
 >  
...
 > I have tried the fr_timer which works, I set it to
5000, downside is  
...
 > that when I am in wifi range, I only have 5
seconds to answer the call. 
...
 >  
...
 >    
...
 >  
...
 > The fr_inv_timer is not the right one I think, as
I will not get any  
...
 > message from the called number, as that device is
not connected?. 
...
  I'm not an expert on this, but I'll post my
experience and I hope that  
...
  helps. I'm using Kamailio 1.5, so perhaps YMMV.

...

...
  I have fr_timer set to 2 seconds and fr_inv_timer set
to 60 seconds.  
...
  The latter can be overridden by fr_inv_timer_avp so
users can alter  
...
  their own timers. I do not let users change fr_timer.

...

...
  The behavior I see is the device has 2 seconds to give
a provisional  
...
  response to an INVITE. If the device has powered off,
changed IP, etc. 
...
  this timer will quickly return an error. 
...

...
  If the device is responsive and, for example, sends a
180 Ringing, the  
...
  fr_timer ceases to apply and the fr_inv_timer waits 60
seconds before  
...
  giving up and triggering a 408 Timeout. 
it is the same in 3.x, these two parameters are the right to be used in this
way.

Have in mind that in 3.x the accuracy is in milliseconds:

 <http://kamailio.org/docs/modules/stable/modules/tm.html#fr_timer>
http://kamailio.org/docs/modules/stable/modules/tm.html#fr_timer

Another new features in 3.x is that apart of using avps to set it per
transaction (still in seconds), there is a new function that can be used to
set it in milliseconds per transaction:

 <http://kamailio.org/docs/modules/stable/modules/tm.html#t_set_fr>
http://kamailio.org/docs/modules/stable/modules/tm.html#t_set_fr

Cheers,

Daniel