Hi Alex,
503 is to indicate a failure of the next hop, so it is a kind of
hop-by-hop failure indication. So, it is bogus to forward should reply
as you will forward the failure indication to a wrong hop.
For example 503 reply is used for DNS-based failover (as trigger).
So, if you have something like:
phone -> proxy -> GW
If GW generates a 503 to indicate a failure (so the proxy to take any
failover actions), such reply must not be forwarded to phone, as
otherwise the phone will interpret the reply as a failure indication
from proxy.
Regards,
Bogdan
Alex Massover wrote:
>
> Hi,
>
>
>
> Maybe I missed that lesson, but I'm curious what is the idea behind
> implicit translation of responses (503à500)?
>
> Can somebody explain me please?
>
>
>
> --
>
> Best Regards,
>
> Alex Massover
>
> Telephony Group Manager
>
> R&D Department
>
> Jajah Inc.
>
>
>
>
>
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--
Bogdan-Andrei Iancu
OpenSIPS Bootcamp
15 - 19 November 2010, Edison, New Jersey, USA
www.voice-system.ro
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