ZyXEL Communications AAM1212, Руководство пользователя

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AAM1212 User’s Guide
160 Chapter 22 Diagnostic
22.3 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.
THERMO OVER
VOLTAGE:
nominal:<nominal>(
mV)
value:<voltage>
mV)!
WARN
The voltage went outside of the accepted operating range.
<nominal> - nominal voltage of the DC power
<voltage> - voltage of the DC power when logged
THERMO OVER
VOLTAGE released:
nominal:<nominal>(
mV)
value:<voltage>
(mV)!
INFO
The voltage is back inside the accepted operating range.
<nominal> - nominal voltage of the DC power
<voltage> - voltage of the DC power when logged
Table 54 Log Messages
LOG MESSAGE TYPE DESCRIPTION
Table 55 Line Diagnostics Test Parameters
LABEL DESCRIPTION
number_of_
subcarries
Discrete Multi-Tone (DMT) modulation divides up a line’s bandwidth into sub-
carriers (sub-channels) of 4.3125 KHz each.
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 AAM 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.