Chapter 52 ADSL Commands

 

Table 96 Line Diagnostics Get Command (continued)

 

LABEL

DESCRIPTION

 

latn:

This is the upstream and downstream Line Attenuation (in .1 dB).

 

satn:

This is the upstream and downstream Signal Attenuation (in .1 dB).

 

snrm:

This is the upstream and downstream Signal-to-Noise Ratio Margin (in .1 dB). A

 

 

DMT sub-carrier’s SNR is the ratio between the received signal power and the

 

 

received noise power. The signal-to-noise ratio margin is the maximum that the

 

 

received noise power could increase with the IES-612-51A still being able to

 

 

meet its transmission targets.

 

 

 

 

attndr:

This is the upstream and downstream Attainable Net Data Rate (in bit/s).

 

farEndActatp:

This is the upstream and downstream Far End Actual Aggregate Transmit

 

 

Power (in .1 dBm)

 

i

This is the index number of the DMT sub-carrier.

 

li.rl

The channel characteristics function is represented in linear format by a scale

 

 

factor and a complex number. This is the real part of the complex number used

 

 

in producing the channel characteristics function for this sub-carrier.

 

 

 

 

li.im

The channel characteristics function is represented in linear format by a scale

 

 

factor and a complex number. This is the imaginary part of the complex number

 

 

used in producing the channel characteristics function for this sub-carrier

 

 

 

 

log

This is a format for providing channel characteristics. It provides magnitude

 

 

values in a logarithmic scale. This can be used in analyzing the physical

 

 

condition of the DSL line.

 

 

 

 

QLN

The Quiet Line Noise for a DMT sub-carrier is the rms (root mean square) level

 

 

of the noise present on the line, when no DSL signals are present. It is

 

 

measured in dBm/Hz. The QLN can be used in analyzing crosstalk.

 

 

 

 

SNR

This is the upstream and downstream Signal-to-Noise Ratio (in .1 dB). A DMT

 

 

sub-carrier’s SNR is the ratio between the received signal power and the

 

 

received noise power. The SNR can be used in analyzing time dependent

 

 

changes in crosstalk levels and line attenuation (such as those caused by

 

 

temperature variations and moisture).

 

 

 

52.2.9 Line Diagnostics Get 992.3 Command

Syntax:

ras> adsl linediag getld992_3 <port number>

Use this command to display the line diagnostics results in the format defined in the ITU-T G.992.3 standard after using the line diagnostics set command on a DSL port. Use the line diagnostics results to analyze problems with the physical DSL line.

"Wait at least one minute after using the line diagnostic set command before using this command.

 

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IES-612-51A User’s Guide