User's Manual

SME VoIP System Guide, Version 1.5
Proprietary and Confidential
Chapter: SME System Deployment Scenarios
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3.3.3 Case ##3: Large to Medium Sized Enterprises
This scenario is a multi-cell setup can be deployed in e.g. Corporate headquarters, Harbour areas, High
School Campus. In the illustration shown below, handsets can roam and handover to other bases.
3.3.4 Case ##4: Large Enterprises at Different Locations
In this scenario, multi-cell systems are deployed at different locations; geographically separated from each
other. An example of this setup includes Government departments/agencies geographically separated from
each other; University campuses or Hospital(s) in different regions.
Roaming and handovers are permitted in this setup even though the each multi-cell system is
geographically separated from each other.
Each base station has a unique identifier. Handsets registered to one multi-cell setup can be used in other
geographically separated setups because visited base stations retrieves the base station identifier which
the visiting handset is originally registered to.
In addition, the relevant SIP server functions must be enabled to so roaming and handover can be allowed
at different geographies.