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Always investigate tests in the order they are presented in the table below when inspecting errors in the system. By clearing error codes associated with the NPE Crosstalk Test, for example, you may also clear errors generated from other tests in the testing sequence.
If errors logged by test #3 are the only complaints against this trunk, then the system technician should check if MFT/Range Extenders are being used. If extenders are present, then there is a good chance that there is excessive loop current, which will cause Test #3 to log errors.
However, all else being normal, these errors should not affect the customer.
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