Nortel Networks NN43001-121 manual LCS 2005 and OCS 2007 coexistence, Client considerations

82Planning and engineering

Feature Operation	Description
Office Communications
Server and MCS
coexistence	ATTENTION
	All Converged Office users must have their extension configured as
	CLS CDMR.
	A user cannot have both Office Communications Server and MCS
	enabled for their extension (all TN’s that have a particular number
	and extension). If any of the TN’s have CLS CDMV or CLS CDMO
	configured, the extension is treated as having MCS enabled. When
	MCS (SIP CD) is enabled on an extension, Office Communications
	Server Converged Office is not supported for that extension in Release
	4.5B and 5.0.
CallPilot	For PBX Integration Enabled (Computer Mode) calls to access the
configuration	CallPilot mailbox, the Pound key (#) is pressed. Every mailbox must
	have the optional messaging network configured. In a normal CS 1000
	- CallPilot scenario, this configuration is optional. For PBX Integration
	Enabled (Computer Mode) calls to CallPilot to work properly, this extra
	configuration is required. For more information about the configuration of
	CallPilot, see CallPilot Network Planning Guide (NN44200-201).
Conference Call and	Conference Call and DND features in RCC mode are not supported by
Do Not Disturb (DND)	Microsoft.
features

LCS 2005 and OCS 2007 coexistence

This section describes the coexistence limitations of LCS 2005 and OCS 2007.

Client considerations

Features hosted on Office Communications Server 2007 are not supported by the OC 2005 client. After a user is configured for enhanced presence, the account can no longer use previous versions of OC 2005 , Communicator Web Access 2005, or Communicator Mobile 2005. Microsoft recommends that you upgrade all client computers for a particular user at the same time. Communicator 2007 clients cannot log on to Live Communications Server 2005. Verify that any user whose client is upgraded to Communicator 2007 is already provisioned on an Office Communications Server.

Converged Office functionality

An upgrade from the LCS Application Proxy to the OCS Proxy Server and MCS 2.0 to MCM 3.0 is required to manage CS 1000 telephones by the OC 2007 client in either VOIP or RCC mode. Inter-working of MCM 2.0 with OCS Proxy Server or MCM 3.0 with LCS Application Proxy is not a

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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