I encounter bit errors under the Performance Monitoring (PM) tab on my optical or electrical card. What do these errors mean?
A. Bit errors on optical cards are usually a result of power levels outside the specified threshold for the OCn card in question. Low signals can be the result of poorly seated or dirty fiber connectors. They can also be caused by incorrect OCn card type in that the power budget for the particular card type is insufficient for the loss on the span. “Hot” signals must be attenuated such that the level is comfortably within the Rx threshold for the specified card. Bit errors on electrical cards are generally caused by defective cabling, improperly provisioned Line Build Out, synchronization problems and defective hardware. Perform facility and terminal loopbacks to isolate the cause. Always use a test set whenever possible, because the cause of the errors could be external cabling or equipment connected to the Cisco ONS 15454.
Related Questions
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