ZyXEL Communications MSAP2000 manual Line Diagnostics Test Parameters

MSAP2000 AAMS User’s Guide

21.3 Line Diagnostics Test Parameters

The following table lists the line diagnostics test parameters that display, see the ITU-Tís

G.992.3 for more information.

Table 55 Line Diagnostics Test Parameters

LABEL	DESCRIPTION
number_of_	Discrete Multi-Tone (DMT) modulation divides up a line’s bandwidth into sub-
	carriers (sub-channels) of 4.3125 KHz each.
subcarries
	The first number is the total number of DMT sub-carriers the ADSL connection is
	using. The second number indicates how many upstream DMT sub-carriers the
	ADSL connection is using.
hlinScale	The channel characteristics function is represented in linear format by a scale
	factor and a complex number. These are the maximum upstream and
	downstream scale factors used in producing the channel characteristics function.
latn	This is the upstream and downstream Line Attenuation (in dB).
satn	This is the upstream and downstream Signal Attenuation (in dB).
snrm	This is the upstream and downstream Signal-to-Noise Ratio Margin (in 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 MSAP2000 AAMS 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 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.

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