User's Manual

PERFORMING DOWNLOADS
File Authentication Requirements
VX 675 R
EFERENCE GUIDE 115
OS. In this download operation, all application files stored in Group 1 are
automatically erased.
• If a partial OS download was selected in the Verix Terminal Manager, the
operating system returns control to Verix Terminal Manager after the
download completes. To process the new OS, you must manually restart the
terminal by selecting the appropriate Verix Terminal Manager menu option. In
a partial OS download operation, application files stored in Group 1 are not
erased.
• When the OS download is initiated, the OS file authentication progress is
displayed on the screen as new certificates are authenticated and added to
the terminal’s certificate tree, and as signature files for corresponding OS files
are detected and authenticated, as shown in Figure 31.
• While the new OS is being processed, there is no visible indication on the
terminal display of the progress of processing. When the new OS is processed
(this usually takes a few moments), the terminal restarts automatically and the
OS download procedure is complete.
File Authentication
for Back-to-Back
Application
Downloads
When performing a back-to-back application download between two VX 675
terminals, the file authentication process on the receiving terminal is similar to an
application download from a host computer to a standalone VX 675 terminal.
There are, however, some important differences to take into account:
• Only a full application download is supported for back-to-back data transfers.
You cannot perform partial back-to-back application downloads.
• Before you can initiate the back-to-back download, you must enter Verix
Terminal Manager in both terminals, select Group 1 as the target group for
both terminals, and enter all required passwords.
• All signature files required to authenticate the download application(s) must
reside in the memory of the sending terminal. They must not be deleted
through the *FA variable being cleared to 0 on previous downloads.
• Any sponsor and signer certificates downloaded to and authenticated on the
sending terminal are stored in the certificate tree of that terminal. When you
perform a back-to-back download, certificate files are reconstructed from the
data present in the sending unit’s certificate tree.
• All certificates transfer to Group 1 I: drive on the receiving terminal, except for
the highest-level platform root certificate, which can never be transferred to
another terminal.
• When certificates are detected by the file authentication module of the
receiving terminal, they are processed exactly as in a direct download: All
CAUTION
If the power supply to the receiving terminal is accidentally cycled during an
operating system download procedure, the terminal may permanently lock up. In
that case, return the terminal to VeriFone for service.