[cisco-voip] using a set of trunks when others are not available only (not if they are being used)

[Jonathan Charles]

AAR ONLY works if there is a 'not enough bandwidth' from locations-based
CAC.

You are basically screwed.

Here's why.

First, if you include the failover trunks in a route-list with other
route-groups, as soon as the first fill up, the call will be routed to the
next port in the route list.

Your only real option is to create a new route pattern and point that at
your failover trunks, however, this would require your users to enter
different digits.

There is one method, using HSRP and tracking the D-channels for the primary
interfaces, when they go down the other will become active and if (and only)
they are H.323 calls will then go to that IP.

This would require buying more hardware probably...



Jonathan

On 1/24/07, Lelio Fulgenzi <lelio at uoguelph.ca> wrote:
>
>  I'd like to setup a route list so that a secondary group of PSTN trunks
> are used as a backup in case the primary group is unavailable. I don't want
> the secondary group to be used if the primary group is all busy.
>
> What are my options here? I've looked at AAR but it talks about bandwidth
> allocations etc. Not sure if that's what I'm looking for.
>
>
> --------------------------------------------------------------------------------
> Lelio Fulgenzi, B.A.
> Senior Analyst (CCS) * University of Guelph * Guelph, Ontario N1G 2W1
> (519) 824-4120 x56354 (519) 767-1060 FAX (JNHN)
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> I'm changing my name to iPhone. Who do I pay trademark rights to?
>
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