[VoiceOps] Disconnected numbers and SIP

[James Milko]

We've found 404 to be extremely reliable when received from upstream
carriers.  It's one of the very few codes that we don't route advance on
because we found that calls never compete if someone hands back a 404.

JM



On Tue, Oct 20, 2015 at 10:48 PM, Alex Balashov <abalashov at evaristesys.com>
wrote:

> ‎Thanks. And I'm guessing the best one can hope for from a SIP termination
> provider is an ambiguous 404, or, more likely, a 503, which seems to have
> become misused an opaque, catch-all epithet for any and all completion
> failures?
>
> --
> Alex Balashov | Principal | Evariste Systems LLC
> 303 Perimeter Center North, Suite 300
> Atlanta, GA 30346
> United States
>
> Tel: +1-800-250-5920 (toll-free) / +1-678-954-0671 (direct)
> Web: http://www.evaristesys.com/, http://www.csrpswitch.com/
>
> Sent from my BlackBerry.
>
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