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M/T-PKT (Maintenance/Test Packet Bus Port)
Issue 1 June 2005 1725
Clear Error Counters (#270)
This test is not an actual test in the strict sense of the word. Many circuit packs have counters in
the Angel firmware. The circuit pack’s Angel continuously runs port self-tests on idle ports and
keeps track of any errors it detects by incrementing a firmware counter. When the counter value
reaches some preset threshold, the Angel sends a single CCMS (Control Channel Message
Set) error message uplink to Communication Manager. No more error messages of that type
are sent uplink until the Communication Manager sends a downlink message to clear the
counter. This strategy keeps a failed port/circuit pack from flooding Communication Manager
with a continuous string of identical error messages. This test is used to clear the counter, so
that if the port continues to fail during or after Communication Manager demanded testing, the
Angel will send a message to indicate that fact.
This test is only used to send a downlink message to the Angel on the Maintenance/Test circuit
pack. Since the Angel normally provides no uplink response to this message, this test should
never abort or fail.
Table 639: Test #270 Clear Error Counters
Error
Code
Test
Result
Description / Recommendation
Any ABRT This test should never abort.
Any FAIL This test should never fail.
1. Retry the command at 1-minute intervals up to 5 times.
2. If the test continues to fail, escalate the problem.
PASS The message to clear the Maintenance/Test circuit pack’s counter for
Background Maintenance Failures has been sent.