HA CMS and Survivable CMS

Last Updated : Aug 07, 2025 |
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Avaya offers two reliability-focused options for CMS: High Availability (HA) CMS and Survivable CMS.
With HA CMS, you deploy two CMS systems that both receive identical call data from the same Communication Manager. This setup ensures redundancy by duplicating the Automatic Call Distribution (ACD) data across both systems, improving reliability during network or server failures.
Survivable CMS enhances system reliability by collecting call data from the Communication Manager Survivable Core and Survivable Remote technologies. Survivable CMS supports the following deployment models:
  • Dual Role CMS: The HA CMS connects to Communication Manager and Survivable Core or Remote.
  • Dedicated Survivable CMS: A separate CMS connects only to Survivable Core or Remote.
Survivable CMS helps users stay productive and minimizes service disruption even if the main site becomes unavailable due to network or server failures.
When deploying HA CMS, Survivable CMS, or a combination on AWS, each CMS must have its own OVA file. Each virtual machine must be set up as an active, licensed CMS to function correctly.
Along with the ACD data redundancy offered by HA CMS and the data resiliency provided by Survivable CMS, Avaya includes a feature that synchronizes administrative data from the primary CMS to the HA CMS or Survivable CMS deployment. This synchronization ensures that all systems stay aligned with the latest administrative data.
Contact your account team for more information about HA CMS and Survivable CMS.