Nortel 1000 Fundamentals page 136

136 Configuration
Figure 43
MCM architecture
The following examples illustrate how MCM handles call information.
Understanding the role of MCM in the Telephony Gateway and Services
component helps you to determine the configuration.
Example 1: Outgoing calls from Office Communicator
In this example, an invite travels from the client to the OCS Front End
server, and then to the Office Communications Server MCM Proxy through
the Mediation Server. MCM checks which NRS is active, and then sends an
invite to that SIP Redirect Service (SRS). In this case, the invite is qualified.
To return from the SRS, 302 is used. The invite is then sent unqualified to
the CS 1000 associated with the originator's location code and DN.
Example 2: Incoming calls to Office Communicator
In this example, the user has a desktop telephone and a Personal Call
Assistant (PCA) that points to an Office Communications Server 2007
server. The PCA sends a DN or Routing DN. The call was originally made
to 6 231 3052, but the PCA hot key is configured with 6 344 5000. This is a
"dummy" routing DN; it can be configured with all hot keys in the network.
In a CDP network, the dummy routing DN (for example, 6 231 3052) must
also be configured by a DSC (for example, 8200). The DSC is configured
on the NRS as a routing entry for the MCM Gateway endpoint.
Nortel Converged Office Fundamentals — Microsoft Office Communications Server 2007
Copyright © 2005–2008, Nortel Networks
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Nortel Communication Server 1000
NN43001-121 01.03 Standard
Release 5.0 30 April 2008