Call Management System (Cms); Ec500; Property Management System (Pms); Voice Mail (Audix, Intuity, Octel, Modular Messaging) - Avaya ESS User Manual

ESS Design and Planning

Call Management System (CMS)

CMS connects to the server through a CLAN. In the event of a failover, an ESS server may
control the Port Network that contains the CLAN. In this case only the events that are under
control of that ESS server will be sent to the CMS. All other related system data will be lost. This
occurs in the event of a fragmented system resulting from a control network failure.

EC500

EC500 users will have access to the EC500 service only if their endpoint is also under the
control of the same ESS server that controls the EC500.

Property Management System (PMS)

PMS interfaces to the server through a CLAN. If the network is fragmented, only the Port
Network with that CLAN, under control of an ESS server, will be able to pass entered or event
data to the PMS.

Voice Mail (Audix, Intuity, Octel, Modular Messaging)

In the event of a failover, the ESS server will only be able to deliver covered and diverted called
parties to voice messaging systems that are connected to the same controlled system segment
as the calling party.
A user of a voice mail system will only get a message waiting indication if their messaging
server is in the same controlled segment as their station. The only way a voice mail user will be
able to retrieve messages is through a dial connection or tool, such as Message Manager, to
connect to the voice mail system.

Voice Response Systems (Conversant)

The voice response system is connected by ports to a Port Network. The Port Network is under
the control of the Main server(s). In the event of a failure resulting in a fragmented system, the
voice response system will be able to execute any instructions that can be handled by call
processing in the Port Network under the control of the same server. Other requests will be
denied.
92 Avaya Enterprise Survivable Servers (ESS) Users Guide