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Adsl 4-51 – SMC Networks Barricade SMC7404BRA EU User Manual

Page 76

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ADSL

4-51

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.