Nortel 1000 Fundamentals page 39

Figure 11
Medium network configuration
Large network
A large network can include the following components:
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You will need:
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Nortel Converged Office Fundamentals — Microsoft Office Communications Server 2007
Copyright © 2005–2008, Nortel Networks
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multiple CS 1000 systems with Media Gateway and Signaling Server
configured collaborative NRS
redundant Primary and Alternate NRS
more than 5000 users
high availability with system redundancy for OCS 2007
an OCS 2007 Enterprise Edition server with Load Balancers to Front
End the pool of Enterprise Edition servers
a redundant OCS Proxy servers that run MCM 3.0 (the recommended
deployment requires that MCM reside on a separate OCS Proxy server)
Mediation servers
Load Balancers
Nortel Communication Server 1000
NN43001-121 01.03 Standard
Release 5.0 30 April 2008
Network configuration 39