Phone Initialization - Avaya B189 Installing And Maintaining

Phone initialization

This section description describes the software architecture on which the requirements are
based and provides an overview of how you can expect the phone to operate during startup
and software upgrades. This description is not a comprehensive description of all internal tasks
performed during startup.
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
Installing and maintaining Avaya B189 Conference IP Phone
Phone initialization
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