[Kamailio-Users] fr_anything_at_all_timer.

[Daniel-Constantin Mierla]

Hello,

On 10/13/08 16:14, Klaus Darilion wrote:
> Hi Alex!
>
> Not sure what you mean:
>
> For detection if the gateway responds at all use fr_timer. I set it to 2 
> seconds. If there is no reply from the gateway within 2 seconds, the 
> failure route will be executed. If there is a reply (e.g. 100), then tm 
> module changes to fr_inv_timer which I have set to 120 seconds.
>   
if I get it right, might be similar to something I encountered quite 
recently. There are some PSTN termination providers that frontend their 
GW farm with a proxy. That proxy sends quickly 100 trying but then it 
takes too long to get ringing or 200ok.

So I would have needed to change to fr_inv_timer if != 100 is received 
in fr_timer.

Cheers,
Daniel

>
> regards
> klaus
>
> Alex Balashov schrieb:
>   
>> It would be really nice to have a feature in TM for even faster failover 
>> that is turned off when any reply is received at all, provisional or 
>> otherwise.
>>
>> The problem with fr_timer and fr_inv_timer is that they throw on lack of 
>> final reply.  But sometimes gateways have very lengthy, complicated 
>> asynchronous operations that must complete before they can return a 
>> final OK.  If you are doing failover, the most important thing to know 
>> is that the gateway is there at all, which the provisional 1xx message 
>> accomplishes.
>>
>> What would be really nice is to have a timer that can be diffused as 
>> soon as a provisional reply arrives.
>>
>> I don't see how this can be accomplished with any of the existing timers.
>>
>>     
>
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-- 
Daniel-Constantin Mierla
http://www.asipto.com