[VoiceOps] Level3 Vector Network - Inbound Failover

Alex Balashov abalashov at evaristesys.com
Wed Sep 1 15:27:43 EDT 2010

They should be able to fail over on a 503.  But not a 603, for the 
reason that 6xx-class errors are semantically different.

On 09/01/2010 03:01 PM, Geoff Mina wrote:

> I am currently setting up Level3 as a provider of SIP Toll-Free
> services.  I am hearing from my account team that they don’t have any
> option other than their BusyNoAnswer option to failover from one SIP IP
> (on my side) to another. If I send back a 486 or there is a timeout they
> can failover to a second trunk. Unfortunately, they can’t decouple the
> 486 and timeout scenarios… and that doesn’t work, because 486 is a
> normal non-error condition on my network and I wouldn’t want the call to
> be re-presented to another location just because the first location sent
> a BUSY.
> I have asked them if they can failover on 5XX errors or internally
> generated 408, but they seem to think they are unable to do anything
> like this.
> Anyone have any experience with Level3 in this scenario?
> Thanks,
> Geoff
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Alex Balashov - Principal
Evariste Systems LLC
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12th Floor, Suite 1200
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Web: http://www.evaristesys.com/

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