Nortel Networks NN43001-121 - Manual (Page 86)

86 Planning and engineering
• An understanding of the coexistence interactions. For more information,
see
"LCS 2005 and OCS 2007 coexistence" (page 82) .
• An understanding of CS 1000, Signaling Server, and networks.
• An understanding of the user migration process.
Determine your deployment options
There are two deployment options depending on whether you are migrating
a small or large client base.
For a small client base, Office Communicator client users can be migrated
from LCS to OCS inside a set maintenance window. No extra servers are
required.
For a large client base, Office Communicator client users need to be
migrated over multiple maintenance windows using a phased approach.
The following choices must be made:
1. If using one SIP CTI FE Signaling Server
• Only LCS users have RCC
OR
• OCS users have RCC
2. If deploying an additional SIP CTI FE Signaling Server
• RCC is supported for both LCS and OCS. One Signaling Server for
LCS RCC and the other for OCS RCC
ATTENTION
Before migrating to Office Communications Server 2007, existing Live
Communications Servers must have Live Communications Server 2005 SP1
installed.
Migration process
The following table breaks down the migration process using a phased,
outside-in approach and defines the impact for the user at each phase.
Table 19
User experience
Phase Description User experience
1. Upgrade your perimeter
network. Introduce a new Office
Communications Server (OCS)
2007 Access Edge Servers
and Directors into your Live
Communications Server (LCS)
2005 SP1 environment. No changes. Users continue
to use the Microsoft Office
Communicator (OC) 2005 client
and have the same IM and
presence functionality.
Nortel Communication Server 1000
Nortel Converged Office Fundamentals — Microsoft Office Communications Server 2007
NN43001-121 01.03 Standard
Release 5.0 30 April 2008
Copyright © 2005–2008, Nortel Networks
.