ZETRON 748, Technical Manual

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Feature Set Reference
025-9368H 173
System Memory Test
This command will execute a non-destructive memory test on all RAM (random access memory)
installed in the Model 748. The Model 748 is capable of holding up to 128 k-bytes (16 banks) of non
volatile memory with the Call Detail option installed. Standard memory size is 32k bytes (four
banks) of non volatile memory. All volatile (not battery backed) memory is also tested.
This command will only test if the RAM is working, it will not test to see if the programming is
scrambled. When power is first applied to the Model 748, it will perform an integrity test of the
System and User databases. If the System database fails, it will reset the System database. When the
Model 748 checks the User database however, it checks the integrity of each user individually. If a
user's data failed, that user will be marked as bad in the statistics. If more than 20 users turn up bad,
the Model 748 will reset the User database.
How to execute it:
Access the Model 748 through your direct connected PC or terminal, or remotely from your PC
connected to a modem via the Model 748's internal modem.
Once connected to the Model 748 and the Main Menu is on the screen, type “5” and press
ENTER
,
the Diagnostic Menu will be displayed. Select the item number for System memory test and press
ENTER . A message will be displayed indicating that a memory test is in progress and which bank is
currently being tested. If everything is A-OK, a message will appear indicating that the memory test
passed. If the memory test finds a problem, the failed address will be displayed.
Application note:
When this command is executed, it does shut down all other operation. If executing this via modem,
be aware that dispatch activity will be interrupted for the duration of this command. Upon
completion, the Model 748 returns to normal operation.