SMC Networks 7404WBRA, User Manual

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ADSL
4-55
Parameter Description
Status
Line Status Shows the current status of the ADSL line.
Data Rate
Upstream Actual and maximum upstream data rate.
Downstream Actual and maximum downstream data rate.
Operation Data/
Defect Indication
Noise Margin
Upstream Minimum noise margin upstream.
Downstream Minimum noise margin downstream.
Output Power Maximum fluctuation in the output power.
Attenuation
Upstream Maximum reduction in the strength of the upstream signal.
Downstream Maximum reduction in the strength of the downstream signal.
Fast Path FEC
Correction
There are two latency paths that may be used: fast and
interleaved. For either path a forward error correction (FEC)
scheme is employed to ensure higher data integrity. For
maximum noise immunity, an interleaver may be used to
supplement FEC.
Interleaved Path
FEC Correction
An interleaver is basically a buffer used to introduce a delay,
allowing for additional error correction techniques to handle
noise. Interleaving slows the data flow and may not be
optimal for real-time signals such as video transmission.
Fast Path CRC
Error
Indicates the number of Fast Path Cyclic Redundancy Check
errors.
Interleaved Path
CRC Error
Indicates the number of Interleaved Path Cyclic Redundancy
Check errors.
Loss of Signal
Defect
Momentary signal discontinuities.
Loss of Frame
Defect
Failures due to loss of frames.