ZyXEL Communications IES-612-51A manual 369

Chapter 52 ADSL Commands

The following example displays the tone diagnostics results for DSL port 8.

Figure 252 Tone Diagnostics Command Example

ras> ad lined toneD 1 port: 1

number_of_subcarries:	512	32
latn:	24.1	2.7
satn:	24.1	61.3
snrm:	30.2	25.0
attndr:	28008000	1248000
farEndActatp:	-31.0	11.9

i	log(dB)	QLN(dBm)	SNR(dB)
0	N/A	N/A	N/A
1	N/A	N/A	N/A
2	N/A	N/A	N/A
3	N/A	N/A	N/A
4	N/A	N/A	N/A
5	N/A	N/A	N/A
6	-21.1	-125.5	17.5
7	-15.3	-124.0	26.0
8	-9.9	-123.0	31.0
9	-5.7	-120.5	38.0
----------------------		Snip	------------------------
509	6.0	-124.0	29.0
510	6.0	-124.0	29.0
511	6.0	-123.0	26.5

The following table lists the tone diagnostic parameters. See the ITU-T’s G.992.3 for more information.

Table 98 ToneDiag Command

LABEL	DESCRIPTION
number_of_	Discrete Multi-Tone (DMT) modulation divides up a line’s bandwidth into sub-
subcarries	carriers (sub-channels) of 4.3125 KHz each.
	This number indicates how many upstream and downstream DMT sub-carriers
	the DSL connection is using.
hlinScale:	The channel characteristics function is represented in linear format by a scale
	factor and a complex number. This is the maximum upstream and downstream
	scale factor 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 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 dBm)
i	This is the index number of the DMT sub-carrier.

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IES-612-51A User’s Guide