Specifications

PERFORMING DOWNLOADS
Omni 37xx Download Differences
96 OMNI 37XX REFERENCE MANUAL
takes a few minutes), 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 Omni 37xx
terminals, the file authentication process on the receiving terminal is similar to an
application download from a host computer to a standalone Omni 37xx 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 system
mode 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 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 RAM 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 the same as in a direct
download: All certificates are checked one by one and, on authentication, are
added to the certificate tree of the receiving terminal. Then, all signature files
are checked.
• Downloaded certificates (receiving terminal) must synchronize with the
certificate data present in the certificate tree.
Here, synchronized means that the certificate tree of the receiving terminal
can be no more than one revision out-of-sync with the certificate tree on the
sending terminal or the files on the receiving terminal do not successfully
authenticate. In this case, the term
revision refers to any generic change to the
current sponsor and signer certificates stored in the certificate tree of a
deployment terminal.
• When the back-to-back download completes and all certificates and signature
files authenticate, the receiving terminal restarts. If the name of the *GO
application is specified in the Group 1 CONFIG.SYS file of the receiving
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.