Inter-Tel ENDPOINT 8690 - Manual (Page 49)

43 Inter-Tel ® Model 8690 User Guide (ITP Mode)
GET
T
ING ST
ART
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Operating System
When a new version of the operating system is downloaded, the client application
exits, and the upgrade application launches. An upgrade of the operating system takes
approximately 30 minutes to complete.
The upgrade application erases the existing version of the operating system from the
persistent memory. Upon completion, the upgrade application downloads the new ver-
sion of the operating system from the TFTP server. As the new version of the operat-
ing system is downloaded, it is simultaneously written to persistent memory, and you
can monitor the progress. When the download and installation completes, you are
notified and the endpoint resets. The registry settings are lost when the operating sys-
tem is upgraded. This means that certain client application settings stored in the regis-
try are lost as well. These include the session and diagnostic options.
CAUTION
It is imperative that you do not interrupt the operating system process before it
completes. Do not disconnect the endpoint from it’s power source or attempt
to use the endpoint during the download process. These actions may cause
serious damage to the endpoint, and the endpoint may need to be shipped
back to Inter-Tel for repair.