Hardware Load Balancer 31Figure 9IP diagramATTENTIONCustomers must not use their Office Communicator client to call Emergencynumbers (for example, 911). To ensure that emergency service organizations canaccurately trace the source of the call, always use a desktop phone to placean emergency call.Hardware Load BalancerHardware IP Load Balancers (for example, Nortel Application Switches) arerequired for multiple Office Communications Server 2007 Enterprise Editiondeployment. The Load Balancer presents a single virtual IP (VIP) addressto clients to prevent direct access to individual OCS 2007 EnterpriseEdition servers. The Load Balancer uses an algorithm (for example,round-robin, or fewest connections) to route new client requests to theOffice Communications Servers.Nortel Communication Server 1000Nortel Converged Office Fundamentals — Microsoft Office Communications Server 2007NN43001-121 01.03 StandardRelease 5.0 30 April 2008Copyright © 2005–2008, Nortel Networks.
