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Parameter
Status
Line Status
Data Rate
Upstream
Downstream
Operation Data/
Defect Indication
Noise Margin
Upstream: Minimum noise margin upstream.
Downstream: Minimum noise margin downstream.
Output Power
Attenuation
Upstream: Maximum reduction in the strength of the upstream
Downstream: Maximum reduction in the strength of the downstream
Fast Path FEC
Correction
Interleaved Path
FEC Correction
Fast Path CRC
Error
Interleaved Path
CRC Error
Description
Shows the current status of the ADSL line.
Actual and maximum upstream data rate.
Actual and maximum downstream data rate.
Maximum fluctuation in the output power.
signal.
signal.
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.
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.
Indicates the number of Fast Path Cyclic Redundancy
Check errors.
Indicates the number of Interleaved Path Cyclic
Redundancy Check errors.
ADSL
4-51
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