Avaya H.323 9608 Installation And Management Manual page 28

Installing the Deskphone
The system stores the files in five areas of reprogrammable nonvolatile or flash memory in the
phones:
• A boot program area
• Two Kernel/Root File Systems
• One Application File System
• One Temporary Storage area
The phone supports two Kernel or Root File Systems for backup if one file system is corrupted
but activates only one file system when the phone starts or resets. Temporary Storage stores
a new Signed Application or Library Software Package that the current application downloads.
You can then install the package in the active Kernel or Root File System after the next
reset.
When a phone starts, the boot programs check the Kernel or Root File System that was marked
as the one to be activated. If this file system is not corrupted, the boot program transfers control
to a process in that file system. If that file system is corrupted, the boot program checks the
other Kernel/Root File System.
If that file system is not corrupted, the system:
• Marks that file system as the file system to be activated
• Sets the value of RFSINUSE to the name of the Signed Kernel or Root Software Package
that was used to install that file system
• Transfers control to a process in the file system
If both Kernel/Root File Systems are corrupted, the phone becomes nonfunctional and you
must return the phone for repairs.
A process in the active Kernel/Root File System first checks whether a Signed Application or
a Library Software Package is stored in Temporary Storage. If yes, the process installs the
Application Software Package or the Library Software Package. The system installs both if
either software package has a different file name than the currently installed version and
replaces the existing corresponding files in the Application File System. The process then
deletes the copy of the Signed Application or Library Software Package stored in Temporary
Storage. If the process does not find a Signed Application or Library Software Package in
Temporary Storage, the process checks the integrity of the application files. If the files are
corrupted, the process installs files from the Backup Package and replaces the corrupted
application files in the Application File System. Each time an Application Software Package or
a Library Software Package is installed, the system sets the value of the persistent parameter
APPINUSE to the file name of the Signed Application or Library Software Package from which
the package was installed. If the application files are not corrupted, or after the Backup
Package has been installed, the system transfers control to the application installed in the
Application File System. Note that the processes in the Kernel/Root File System do not connect
to the network or download files.
The application then connects to the network, obtains any necessary IP address information,
and download files. The file download begins with the upgrade and settings configuration files,
and including Signed Software Packages and other separately downloaded files such as
28 Installing and maintaining Avaya IP Deskphone H.323 9608, 9608G, 9611G, 9621G, and 9641GJanuary 2014
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