Under the Avaya Aura® Experience Portal Oceana Sample Application variable configuration settings, what is the significance of the backup SIP address in case of a failure in Avaya Oceana®?

Under the Avaya Aura® Experience Portal Oceana Sample Application variable configuration settings, what is the significance of the backup SIP address in case of a failure in Avaya Oceana®?
A . It can be set to a Default VDN number to be used when Avaya Oceana® is unavailable.
B . It can be set to a Routing VDN number.
C . It can be set to a RONA VDN number.
D . It can be set to an alternative Ingress VDN number when the standard Ingress VDN is unavailable.

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Answer: A