Mitel 3300 Technician's Handbook page 114

Technician's Handbook
Java Plug-In
Java Plug-in 1.3.1 comes with the 3300 ICP software.
During ESM backup/restore procedures on this software
version, the software detects whether the proper version
of Java Plug-in (1.3.1) has been installed. If not, it will
prompt you to install the correct version with the
installation wizard.
Database backup
During the upgrade procedure, you are instructed to
perform a backup of your database. Note that during the
first minute of ESM backup, the voice mail system is
inaccessible and in Ring-No Answer state. If users are
still accessing voice mail when you start the ESM
backup, voice mail will remain in Ring-No Answer state
until all voice mail users are disconnected from the
system. Thus, we strongly recommend that you ensure
no one is accessing voice mail before you begin your
ESM backup.
To check if voice mail is currently in use, issue the stat 1
4 27 and stat 1 4 28 ESM maintenance commands.
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Tip: We recommend that you avoid running multiple
versions of Java Plug-in. If you are running the incorrect
version for the upgrade, you should uninstall it from
every PC that is used as an administrator for the 3300
Integrated Communications Platform (ICP) and allow
the software to install the correct version during the next
backup/restore on each one.
Note: We strongly recommend that you ensure the ESM
backup file contains voice mail messages before running
the upgrade procedure (see Step 13 in "Backing up the
database" in the following upgrade procedure).
Note: It is very important to maintain current database
backups; backups should be done on a regular basis.