Cisco Systems 1.4 Manual De Usuario

Personal Assistant separates the speech-recognition functions from call routing and other basic 
functions of the Personal Assistant server. Because these functions are separate, you must configure the 
interaction between the cluster of Personal Assistant servers and the cluster of speech-recognition 
servers. This section describes how the clusters interact, and what you need to do to enable the 
interaction.

 illustrates the Personal Assistant server structure. The dotted line between Personal Assistant 

server B and speech-recognition server 3 illustrates the direct interaction between these servers after the 
connection is established through the resource manager on Personal Assistant server C.

 assumes that you are installing Personal Assistant servers and speech-recognition servers on 

separate platforms. However, you can install the Personal Assistant servers and speech-recognition 
servers on the same platform. When installed on the same platform, the servers still establish 
communications through a resource manager, even if the resource manager is on the same system. In 
fact, you could create a redundant Personal Assistant speech cluster with two systems, each running a 
Personal Assistant server, license manager, and speech-recognition server. Logically, this minimal 
cluster looks the same as the one illustrated in 

To enable the interaction between the Personal Assistant servers and speech-recognition servers, you 
must identify the license managers to a Personal Assistant server. See the 

 for information on how to do this.

Personal Assistant servers and speech-recognition servers work together in server clusters. This makes 
it possible to share the load among servers, and to set up failover relationships so that if a server becomes 
disabled, another server can take over with minimal interruption for your users.

To set up the server clusters, you must:

Determine your server and speech-recognition requirements and install the Personal Assistant 
server and speech-recognition software on an applicable number of servers.

The number of servers required is based on the number of sessions each server supports, the number 
of users you are supporting, and how many users you are willing to support per session.

It is also affected by the number of Cisco CallManager clusters you have, and the distribution of 
WAN connections between them.

PA server A

PA server B

PA server C
license mgr,

resource mgr

1

2

3

Speech-Recognition
Server Cluster

Personal Assistant
Server Cluster

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