[SR-Users] Handle '486 busy here' from upstream carrier

[Alex Balashov]

On 11/11/2010 09:17 PM, JR Richardson wrote:

> So the append_branch should not be used, ok, what about just the
> t_relay and exit?
>
> if (t_check_status("486")) {
>     t_relay();
>     exit;
> }
>
> Would this work?

This is a failure route, a special type of reply route.  Replies are 
automatically passed back, unless explicitly dropped or suppressed due 
to serial forking via a new branch.

So, you don't need to do t_relay() for the response to get back to the 
sender.  In fact, you shouldn't, because this will be taken by Kamailio 
to mean something different than you intend.

The t_relay() call is only for statefully relaying _requests_.

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