Voice interface must be shutdown before updating configuration

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At this point, you now understand the difference between TDM and IP-based voice systems.

To learn how you can restore your activity state, read about the Activity lifecycle.The Polycom SIP phones support a few different methods for software updates, most commonly utilizing a central FTP provisioning server so that all devices will check a single distribution point for configuration changes and new firmware images.The previous article mentioned above contains links with more details on enterprise deployment and management practices.If you declare your activity to handle the orientation change and have images that should change between landscape and portrait, you must re-assign each resource to each element during .In which case, all of the resources used before the configuration change are still used and you've only avoided the restart of your activity.You can add such fragments to your activity to preserve stateful objects.

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