Zyxel VES-1624FT-55A [266/312] Ldm test parameters

Zyxel VES-1624FT-55A [266/312] Ldm test parameters
Chapter 50 Diagnostics
VES-1624FT-55A User’s Guide
266
50.3 LDM Test Parameters
The following table lists the line diagnostics test parameters that display, see the ITU-T’s
G.992.3 for more information.
THERMO OVER
TEMPERATURE: dev:<id>
threshold:<threshold>
(degree C)
value:<temp>(degree
C)!
WARN The temperature was too high at one of the temperature
sensors.
<id> -
0: sensor near the DSL chipset
1: sensor near the CPU
2: thermal sensor chip itself
<threshold> - threshold temperature
<temp> - temperature when the entry was logged
THERMO OVER
TEMPERATURE released:
dev:<id>
threshold:<threshold>
(degree C)
value:<temp>(degree
C)!
INFO The temperature at one of the temperature sensors has come
back to normal.
<id>
0: sensor near the DSL chipset
1: sensor near the CPU
2: thermal sensor chip itself
<threshold> - threshold temperature
<temp> - temperature when the entry was logged
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 113 Log Messages (continued)
LOG MESSAGE TYPE DESCRIPTION
Table 114 LDM 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 DSL connection is
using. The second number indicates how many upstream 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. 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 IP DSLAM still being able to meet
its transmission targets.
attndr: This is the upstream and downstream Attainable Net Data Rate (in bit/s).

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