SNC-BD (Switch Node Clock Circuit Pack)
Issue 1 May 2002
8-1415555-233-143
SNC On-Board Test (#778)
This test is nondestructive.
This test queries the SNC circuit pack for status of the background tests run
on-board. These background tests include an SNC on-board microcontroller test,
clock test, an SNC on-board Stratum-3 oscillator test, and TPN microcontroller
test.
0NO
BOARD
No board was detected by the test.
1. Check that SNC board is properly translated and inserted.
2. Run the test again. If it fails, reset the board. An SNC should be reset
instead of reseating the circuit pack. The reset board command should
almost never be used on an SNC. It may be necessary to use the reset
board command if the SNC circuit pack gets into a mode where it cannot
communicate with software. If an SNC with active errors and alarms is
reset, the errors and alarms may take a while to come back, therefore the
reset board command can mask real problems.
3. Run the test again. If it fails, the ID chip on board may be bad. Replace
the board and retest.
Table 8-570. TEST #778 SNC On-Board Test
Error
Code
Tes t
Result Description / Recommendation
2100 ABORT Could not allocate the necessary system resources to run this test.
1. Retry the command at 1-minute intervals up to 3 times.
2300 ABORT The downlink message necessary to run this test could not be sent.
1. Retry the command at 1-minute intervals up to 3 times.
2301 ABORT The software timer could not be set before sending the downlink message
necessary to run this test.
1. Retry the command at 1-minute intervals up to 3 times.
2303 ABORT The SNC circuit pack responded that the software test requested is not valid.
1. Retry the command at 1-minute intervals up to 3 times.
Continued on next page
Table 8-569. TEST #777 Failure Audit — Continued
Error
Code
Tes t
Result Description / Recommendation
Continued on next page
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