Overview of SIP Mode on the NBX Platform 237To determine if your V3000 or V5000 system has the memory upgradeinstalled:1 Log in to the NBX NetSet utility using the administrator login ID andpassword.2 Click System-Wide Settings > System Identity.3 Verify that Memory Upgrade Installed is set to YES.Licensing andResource LimitsThis section describes the system resource limits on a SIP mode system.SessionsA SIP session is an end-to-end communications path between twoendpoints. A session includes a voice mail transaction, a public orrestricted conference, or a gateway path. There is a maximum limit of300 concurrent sessions on a SIP mode system.When you configure a SIP mode system, be careful about how manysimultaneous sessions you allow for each feature for which you canconfigure sessions. For some NetSet SIP-related functions, such asmessaging and conference configuration, you must estimate the numberof simultaneous sessions that the feature is likely to manage. Forexample, if you estimate that the system is likely to manage up to 30simultaneous voice mail messages, the system blocks the thirty-firstmessage.The number of simultaneous sessions that you specify for a featurecounts against the total device limit for the system. You can determinethe number of devices used against the total number in the Usage Report(click Licenses and Upgrades > Licenses). V3000 and V5000 systems withexpanded memory and V3001R systems can be licensed to manage up to1500 devices.DevicesDevices count against the number of licenses allowed in a group (Group0 – 4). Each telephone consumes one license from the appropriategroup's limit.GatewaysGateways do not count against the device limit itself. Instead, the numberof sessions on the gateway is counted. For example, if you create a
