PLANET ADN-4000 - Manual (Page 82)

[ADSL]
ADSL Firmware
Version:
This field displays current ADSL firmware version.
Line States: This field displays the ADSL connection process and status.
Modulation: This field displays the ADSL modulation status for G.dmt or
T1.413.
Annex Mode: This field displays the ADSL annex modes for Annex A or
Annex B.
Downstream and
Upstream:
Status of SNR Margin, Line Attenuation and Data Rate
SNR Margin: The amount of increased noise that can be tolerated while
maintaining the designed BER (bit error rate). The SNR
Margin is set by Central Office DSLAM. If the SNR Margin is
increased, bit error rate performance will improve, but the data
rate will decrease. Conversely, if the SNR Margin is
decreased, bit error rate performance will decrease, but the
data rate will increase.
Line Attenuation: Attenuation is the decrease in magnitude of the ADSL line
signal between the transmitter (Central Office DSLAM) and
the receiver (Client ADSL Modem), measured in dB. It is
measured by calculating the difference in dB between the
signal power level received at the Client ADSL Router and the
reference signal power level transmitted from the Central
Office DSLAM.
Data Rate: This field displays the ADSL data rate.
3.8.2 System Log
Go to Status -> System Log and you can see the system log file. Click “Save Log” to
save system log file.
The System Log displays data generated or acquired by routine system communication
with other devices, such as the results of negotiations with the ISP's computers for DNS
and gateway IP addresses. The device keeps a running log of events and activities
occurring on the Router. You can click Save Log to display a Windows File Download
dialog box that enables opening or saving the contents of the log to your PC. To remove
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