[cisco-voip] Calling to phones after WAN outage

[Ruben Montes (Europe)]

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