[cisco-voip] Calling to phones after WAN outage

[Justin Steinberg]

AAR doesn't inheritly support that scenario where your WAN link is
down - it only reroutes for lack of bandwidth.

You would have to use the 'forward on unregistered' feature that is
available with CCM 4.2.

You would then put in the full E164 number of the phone and if that
phone is unregistered then the call is extended over the PSTN to reach
the phone when it is in SRST mode.  This depends on the SRST site
having its own PSTN circuit / gateway that terminates those E164
numbers.

Justin



On 5/22/07, Ruben Montes (Europe) <Ruben.Montes at eu.didata.com> wrote:
> Hello,
>
> I have a centralized Hub and Spoke design with a CCM cluster located in the Hub, and IP phones and H323 gateways in the spokes.
>
> To address bandwidth insufficiency, we're going to use AAR. But what happens when the WAN that connects to the sites go down?
>
> In the remote sites I have SRST with translattion profiles that prepend the digits that are needed to call through the PSTN to reach the central phones.
> What should I do in the reverse direction in order to permit the phones in the cenral site to reach the ones that appear as unregistered now using the extensión number?
>
> Regards,
>
> Ruben
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