Considerations; Customer Service - 3Com 3C10402B Administrator's Manual

Software Upgrade 367
The installation of a valid upgrade license removes all restrictions without
the need for a 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, 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 V5000 system and you need to replace the system disk tray
for any reason, 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.
If you have a V3000 system and you need to replace the main system
chassis for any reason, 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.
Licenses for Future Releases
If you purchase a license for a future software release, all software
releases up to that version are included. For example, if you purchase a
license for release R6.0 and you are currently running release R5.0, you
can upgrade to any release R5.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.

Customer Service

If you reboot to R4.2 without installing a valid license, and you run your
system with the restrictions in place (see "Restricted Operation" on
page 366), 3Com Customer Service cannot access the information