VeEX MPA User Manual page 502

MPA_e_manual_D07-00-129P_RevA00
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Power Hot, Power Warm and Power Low Alarms
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Using M.2120 / M.2110 PM
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Insert Alarms
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Insert Errors
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Make Pointer Adjustments
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Use the Event Log
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Saving and Printing Statistics and Settings Reports
SDH Troubleshooting
SDH Troubleshooting Overview
This section provides a brief summary of conditions that can cause SDH errors and
alarms:
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Unit reports Loss of Signal (LOS)
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What causes a B1 error?
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What causes a B2 error?
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What causes a B3 error?
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What causes an AIS alarm?
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What causes an RDI alarm?
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How to Insert Errors
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How to Insert Alarms
Unit Reports Loss of Signal
A Loss of Signal (LOS) occurs when the unit detects an all-zeros pattern for 100
milliseconds or greater on the incoming SDH signal.
If an LOS is present, verify the receive signal strength as indicated by RX in the
LEDs/Quick Status area of the touch screen.
Refer to the SFP Info screen for minimum RX power level.
SDH Tab
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