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Investigate tests in the order presented. By clearing errors associated with the first test, errors generated from other tests may also be cleared. Click on the link to see the full description of the test, error codes, and recommended actions.
Order of investigation
Short test sequence
Long test sequence
D or ND
Primary Signaling Link Hardware Check 636
X
ND
Secondary Signaling Link Hardware Check 639
Layer 2 Status Query Test 647
Remote Layer 3 Query 637
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