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System Technician-Demanded Tests: Descriptions and Error Codes

Always investigate tests in the order presented in the table below when inspecting errors in the system. By clearing error codes associated with the Primary Signaling Link Hardware Check, for example, you may also clear errors generated from other tests in the testing sequence.

Table 37. Order of Investigation
Order of Investigation
Short Test Sequence
Long Test Sequence
D/ND*
Primary Signaling Link Hardware Check (#636)
X
X
ND
Secondary Signaling Link Hardware Check (#639)
X
X
ND
Layer 2 Status Test (#647)
X
X
ND
Remote Layer 3 Query Test (#637)
X
X
ND
*D = Destructive; ND = Nondestructive


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