[cisco-voip] AAR for WAN outage

[David Sullivan]

cisco-voip-bounces at puck.nether.net wrote:
> Hello,
> 
> Can AAR be used to re-route calls when a WAN IP link is down,
> or is it only used when there is insufficient location bandwidth?
> 
> For example our branch offices have 2821 routers with 2xBRI
> interfaces. The routers run SRST.  From our central site we normally
> dial 4-digits to reach a phone at the branch office.
> 
> During a WAN outage, the phones work due to SRST, but to call
> the site from our central site we must dial the full national numbers.
> 
For SRST it's a bit simpler, as part of the call-manager-fallback config
you can configure translation rules that will be used when the router is
in SRST mode:

call-manager-fallback
 max-conferences 3 gain -6
 limit-dn 7960 2
 timeouts interdigit 15
 max-ephones 24
 max-dn 24
 voicemail 6000
 translation-profile incoming internal-exts

voice translation-rule 10
 rule 1 /^29/ /9012345629/
 rule 2 /^27/ /9012346727/
 rule 3 /^28/ /9012347828/
 rule 4 /^4/ /90134512/
 rule 5 /6000/ /901234562900/
!
!
voice translation-profile internal-exts
 translate called 10

There's more information and some examples in the SRST documentation.

Regards.

David
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