PERFORMING DOWNLOADS
Full and Partial Downloads
VX 520 R
EFERENCE GUIDE 103
Implementation of full and partial downloads generally follow the following rules:
• The most common download procedure is a full (complete) application
download.
• Partial application downloads are useful when developing and testing new
applications, but are seldom performed by those who deploy terminals on-site.
• Full OS downloads are usually performed by VeriFone at the factory and, on
occasion, by those who deploy terminals on-site to upgrade older terminals to
a newer OS version.
• Partial OS downloads are performed mainly by VeriFone for development
purposes and are rarely performed in the field.
Full operating
system
download
An entire OS version transfers from a host
PC to the VX 520
terminal.
Files related to file authentication and
terminal configuration settings can be
included in a full OS download. During this
process, RAM is cleared.
Following a full OS download, the terminal
restarts and the file authentication module
is invoked. If the OS files are
authenticated, the new OS updates
(replaces) the existing OS.
Application files stored in the memory area
where the OS downloads (Group 1) are
erased.
• Direct downloads
• Telephone
downloads
Note: Full back-to-
back OS
downloads
are not
supported.
Partial
operating
system
download
Either an entire or a partial OS version
transfers from a host PC to the
VX 520 terminal.
Files related to file authentication and
terminal configuration settings can be
included in a partial OS download.
Following a partial OS download, the
terminal does not restart and returns
control to terminal manager or the issuing
application. The file authentication module
is not invoked, and the new OS is not
processed until you manually restart the
terminal from within terminal manager. If
the new OS is authenticated, it then
updates (replaces) the existing OS.
Application files stored in the memory area
where the OS downloads into (Group 1)
are retained.
• Direct downloads
• Telephone
downloads
Note: Partial back-
to-back
operating
system
downloads
are not
supported.
Table 16 Types of Full and Partial Downloads
Download
Type
Description and Effects
Download Methods
Supported
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