We are in process of implementing ER 911 Server in our environment and we have tested all the configuration except one option i could not find failover. We have one ER Server and multiple sites 911 is processed by these server. I can add another server as a failover in the ER cluster but thats not the option at this time.
My question is
Is there any option/configuration that can be done to process 911 call via local voice gateways for each site, in case if the ER 911 server is down?
I know there is option of Call Forwarding, but that will help me in processing the 911 call through one location Voice Gateway or may be a main security number.
Help is greatly appreciated.