Specifications

PERFORMING DOWNLOADS
Download by Telephone
134 VX 520 REFERENCE GUIDE
10
**VERIFYING FILES**
COMPARE SIGNATURE
FILENAME.P7S
FILENAME.OUT
*AUTHENTIC*
On startup, the file authentication module on
the receiving terminal begins to check for new
certificate (*.crt) and signature (*.p7s)
files included in the download. These special
files then process one at a time; certificates
process first, then signature files.
When the file authentication module is
invoked, the status display informs you of the
progress of the file authentication process. If
file authentication succeeds for a specific
certificate, the
*AUTHENTIC* message is
displayed directly below the certificate
filename. If file authentication fails for a
specific certificate, the
*FAILED* message is
displayed for five seconds below the filename
and the terminal beeps three times, allowing
you to note which certificate failed to
authenticate.
The authentication process then continues to
the next certificate until all new certificates are
checked.
**VERIFYING FILES**
COMPARE SIGNATURE
FILENAME.P7S
FILENAME.OUT
*FAILED*
9
<application prompt>
If the downloaded application successfully
authenticates, the corresponding application
prompt or logo is displayed upon restart.
The terminal can now process transactions.
Note: The message DOWNLOAD NEEDED
appears if:
• The *GO variable is not set.
• *GO does not specify that an application is
present.
• The application did not authenticate (invalid
or missing *.p7s file).
• The application uses shared libraries that
are missing or were not authenticated
(invalid or missing *.p7s files).
If one or more executables in the application
fail to successfully authenticate, the
application may not run. If the application
attempts to access an unauthenticated
executable or library, it may crash. Repeat the
Download by Telephone Procedure using the
correct certificates and/or signature files.
For more information on startup errors, see
STARTUP ERRORS.
DOWNLOAD NEEDED
*GO FILE NOT FOUND
Table 20 Download by Telephone Procedure
Step Display Action