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4-2
C
HAPTER
4: D
UAL
T1/PRI S
TATUS
D
ISPLAYS
Menu Option 1 Checking power-up self test status
Upon power-up, the T1/PRI software performs various tests to ensure
proper operation of the Network Application Card (NAC) hardware.
Selecting option 1 from the status menu displays the results for these
tests:
■
RAM
This test fills the SRAM of the NAC with a pattern sequence, and
then performs a comparison check. The failure level for this test is
Critical.
■
Flash ROM
This test performs a CRC check on the Flash ROM. The failure level
for this test is Critical.
■
Non-maskable Interrupt
This is a write-to-ROM test that results in a non-maskable interrupt
(NMI). Any attempt to write to ROM causes the NMI test code to
run. The failure level for this test is Non-critical.
■
Watch Dog
This test verifies the watch-dog circuitry on the NAC functions
properly. The failure level for this test is Non-critical.
■
Management Bus UART
This is a simple loopback test to verify that the UART that
communicates with the management bus functions properly.
The failure level for this test is Non-critical.
■
User Interface UART
This is a simple loopback test to verify that the UART that
communicates with the UI port functions properly. The failure level
for this test is Non-critical.
■
Time/Space Switch
The NAC’s software runs two built-in self-tests of the time space
interchange (TSI), as well as a write/read test of the TSI registers.
The failure level for this test is Non-critical.
■
Framer 1/2
The T1/PRI software performs various diagnostic exercises to test
the framer chips. The failure level for this test is Non-critical.