3com SuperStack 3 NBX Manual De Usuario

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C
HAPTER
 7: O
PERATIONS
You can click the Reboot button to go to a reboot screen and reboot 
to a previous NBX software release.
You can click the License button to go to a license screen and enter a 
license key for R4.2.
The installation of a valid upgrade license removes all restrictions without 
the need for an NBX system reboot operation.
Considerations
Some situations require specific actions because of the system software 
licensing mechanism.
Chassis or Disk Tray Replacement
If you have an NBX 100 system and you need to replace the main system 
chassis for any reason, you must provide a valid license backup file to 
your 3Com NBX Voice-Authorized Partner. This file enables them to 
provide you with license keys equivalent to those that were associated 
with the replaced chassis.
If you have a SuperStack 3 NBX system and you need to replace the 
system disk tray for any reason, you must provide a valid license backup 
file to your 3Com NBX Voice-Authorized Partner. This file enables them to 
provide you with license keys equivalent to those that were associated 
with the replaced disk tray.
Licenses for Future Releases
If you purchase a license for a future NBX software release, all software 
releases up to that version are included. For example, if you purchase a 
license for release R5.0 and you are currently running R4.2, you can 
upgrade to any R4.X release without the need to purchase an additional 
license.
Downgrading to Previous Releases
If you are running R4.2 with a valid system software license and you want 
to downgrade to a previous, unlicensed software version (for example, 
R4.0 or R4.1) you can do so by rebooting to the previous version. No 
other action is required.