Nortel 1000 Fundamentals page 89

Migrating users from LCS to OCS
Step
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Nortel Converged Office Fundamentals — Microsoft Office Communications Server 2007
Copyright © 2005–2008, Nortel Networks
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Migration planning from LCS 2005 to OCS 2007 89
Action
Upgrade your perimeter network by deploying an Access Edge
Server that communicates with Live Communications Server
2005 Director. When Director is not deployed, the edge server
communicates directly with your internal Live Communications
Server 2005 Standard Edition servers or Enterprise pool and the
new Access Edge Server is configured as the next hop server to
which existing pools and Standard Edition Servers will route external
traffic. Next, an Office Communications Server 2007 Director is
deployed to replace Live Communications Server 2005 Director.
Incoming and outgoing traffic is configured to go through the new
Director (if a Director was previously not used and you do not want
to use one now, this step can be skipped). For more information,
download Microsoft technical documentation from the Download
Center at www.microsoft.com.
In this phase, an internal Office Communications Server 2007
Standard Edition Server or Enterprise pool is deployed. Move an
initial group of users to the new server or pool but they will continue
to use OC 2005 as their client. If required, deploy an Archiving and
CDR Server. DNS update is required next. For more details, see
"LCS 2005 and OCS 2007 coexistence" (page
Upgrade CS 1000 and if determined for your migration, add an
additional Signaling Server as the SIP CTI FE. Upgrading Call Sever
and Signaling Server according to standard procedures. For more
information, see "LCS 2005 and OCS 2007 coexistence" (page
Deploy OCS 2007 Mediation Server. For more information
on deploying Mediation Server, download Microsoft technical
documentation from the Download Center at www.microsoft.com.
Deploy OCS Proxy server with MCM 3.0 . For more information, see
"OCS Proxy server installation" (page 107)
(page 109).
Enable enhanced presence and continue migrating users. Start
to move users from Live Communications Server 2005 to Office
Communications Server 2007. By enabling enhanced presence,
users are allowed to use Office Communicator 2007 and the new
functionality that it provides. After enabling the users for enhanced
presence, roll out OC 2007 client to each computer for these users.
Once a user is enabled for enhanced presence, they can no longer
use any previous client versions. For more information on enhanced
presence, download Microsoft technical documentation from the
Download Center at www.microsoft.com.
Nortel Communication Server 1000
NN43001-121 01.03 Standard
Release 5.0 30 April 2008
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and "MCM installation"