[OpenSIPS-Users] 6xx reply handling and acc

[Bogdan-Andrei Iancu]

Hello Brett,

If the 6xx_blocking is on (by default), when receiving a 6xx reply, TM 
will select that branch as winning branch and it will not allow any 
addition of new branches - all will fail (in failure route).

Regards,

Bogdan-Andrei Iancu
OpenSIPS Founder and Developer
http://www.opensips-solutions.com


On 05/03/2013 12:04 AM, Brett Nemeroff wrote:
> Hello list,
> I have a question about default handling of 6xx replies and acc. I 
> have a 1.8 build that does NOT have disable_6xx_block set (it's just 
> default).
>
> I'm seeing cases where when I get a 6xx (after a 18x reply) where 
> failure route causes it to roll to another block, but it'll never 
> t_relay the call out; or I think that is what is happening.
>
> So my first carrier attempt results in 18x then 606. I get a 606 for 
> the invite in missed_calls. Then I relay both the 606 and a 500 Server 
> Unavailable 19/SL to the originator. Weird thing is, then missed_calls 
> shows the second carrier it would have tried, but SIP traces show it 
> never did. I guess I"m wondering how the default handing changes the 
> callflow when a failure route is hit with a 6xx reply?
>
> Thanks,
> Brett
>
>
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