Nortel Networks NN43001-121 manual Determine your deployment options, Migration process

86Planning 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	Introduce a new Office	No changes. Users continue
network.	Communications Server (OCS)	to use the Microsoft Office
	2007 Access Edge Servers	Communicator (OC) 2005 client
	and Directors into your Live	and have the same IM and
	Communications Server (LCS)	presence functionality.
	2005 SP1 environment.
	Nortel Communication Server 1000
Nortel Converged Office Fundamentals — Microsoft Office Communications Server 2007
	NN43001-121 01.03 Standard
	Release 5.0 30 April 2008

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