Survivable remote servers can function as survivable call processing servers for remote or branch customer locations. Survivable remote servers have a complete set of Communication Manager features. With the license file, survivable remote servers function as survivable call processors.

If the link between the remote branch gateways and the primary controller breaks, the telephones and the gateways register with the survivable remote server. Survivable remote servers provide a backup service to the registered devices and control these devices in a license-error mode.

For more information about survivable remote servers, see Avaya Aura® Communication Manager Hardware Description and Reference.