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There may be some scenarios in which the end user's PBX has to be totally disconnected from the Internet. 

No Internet Connection

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In other cases, Internet connection is present but there may be hard restrictions coming for example from the IT Manager which will prevent your system access with the Public Internet Network.

Highly Restricted Network

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The PBXact has a few fundamental commissioning and maintenance requirements where the PBXact system absolutely must be connected to the Internet to allow the exchange of information.  Licensing, Module Update, System Updates and Support VPN are key features that absolutely require Internet connectivity.  Although, once Licensing, Module Update, and System Updates have been completed in there online License activation and proper Module and System updates, the PBXact can then be moved into an isolated network.   From this point, the PBXact system will work in this isolated environment, with the exception of the features that require Internet access.

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Do Not use Hostnames, if there are no DNS Servers to resolve them. 

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Other Services

Because the PBXact is designed to work in an IP network environment and mostly connected to the Internet, once you plan to disconnect your system from the public network, you must take care of some key services running on the box. Most of them are included into the System Admin Pages module: System Admin Module

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Whether the Staging Network is the same Subnet or different - if different the option of adding additional IP Address(es) in System Admin - Network Settings to the new isolated network is possible.  Once configured, the PBXact can be turned off and moved over to the new isolated environment.

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Application Awareness

When the PBXact is disconnected from the public Internet, there are some applications that will be limited:

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