In a Geographic-redundant deployment, you can deploy two different Avaya SBC devices in two different data centers. You can deploy the devices as individual Avaya SBC devices or devices managed by their own EMS. You can deploy these Avaya SBC devices in a High Availability mode or a non-High Availability mode. You can deploy EMS in High Availability mode in different data centers only if layer 3 connectivity is available between the two data centers.