Prior to AE Services 6.1, only switch connections on CLANs were supported for Enterprise Survivable Server (ESS) configurations. Beginning with AE Services 6.1, switch connections on both CLANs and Processor Ethernet (PE) connections are supported for ESS configurations. Additionally, any DMCC endpoints registered to the main switch (using the Time-to-Service feature) will automatically re-register to the ESS or LSP.

Uninterrupted telephony is important for many enterprises, especially for mission-critical applications. Avaya Communication Manager provides Enterprise Survivable Server (ESS) and Local Survivable Processor (LSP) for failover from the main media server. This feature provides the ability for media gateways, endpoints, application servers like AE Services and its applications to continue their operations without major interruption.

AE Services recommends that all applications in an ESS configuration connect to a local AE Services server which, in turn, is connected to either the media server at the main site or a media gateway with an ESS or LSP at the remote site. In this configuration, the applications and associated AE Services server at the remote sites are always active and are supplying functionality for the local resources at the remote site. This type of configuration ensures the most seamless survivability in an ESS configuration.

For more information, see White paper on Avaya Application Enablement Services High Availability (HA) Configurations, located on the Avaya Support Web site http://www.avaya.com/support.