Status, Noise Margin, Output Power Attenuation

Status

The Status page displays

ADSL status information.

Parameter	Description

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. Maximum
	fluctuation in the output power

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	There are two latency paths that may be used: fast
Correction	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	An interleaver is basically a buffer used to
Path FEC	introduce a delay, allowing for additional error
Correction	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	Indicates the number of Fast Path Cyclic
Error	Redundancy Check errors.

Interleaved	Indicates the number of Interleaved Path Cyclic
Path CRC Error	Redundancy Check errors.

Loss of Signal	Momentary signal discontinuities.
Defect

Loss of Frame	Failures due to loss of frames.
Defect

Loss of Power	Failures due to loss of power.
Defect

Fast Path HEC	Fast Path Header Error Concealment errors.
Error

Interleaved	Interleaved Path Header Error Concealment errors.
Path HEC Error

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