Survivable core servers provide survivability to port networks by putting backup servers in various locations in the customer network. The backup servers service port networks when:
The Simplex server fails.
The Duplex server pair fails.
connectivity to the main Communication Manager server is lost.
Survivable core servers can be either Simplex or Duplex servers. The servers offer full Communication Manager functionality in the survivable mode, provided enough connectivity exists to other Avaya components. For example, endpoints, gateways, and messaging servers.
