ZyXEL Communications MSC1000G Series, Руководство пользователя

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Chapter 11 Profile Screens
Management Switch Card User’s Guide
334
Min SNR (0.1
dB)
Type the minimum upstream signal to noise margin (measured in tenths of a decibel).
Configure the minimum upstream signal to noise margin to be less than or equal to the
maximum upstream signal to noise margin.
Target SNR
(0.1 dB)
Type the target upstream signal to noise margin (measured in tenths of a decibel).
Configure the target upstream signal to noise margin to be greater than or equal to the
minimum upstream signal to noise margin and less than or equal to the maximum
upstream signal to noise margin.
RA Mode Select the upstream rate adaptation setting.
Select fix to not use any rate adaptation.
Select startup to use rate adaptation at initialization.
Select runtime to use rate adaptation at any time while the connection is up.
Up-shift Noise
Margin (0.1
dB)
The upstream up shift signal to noise margin (measured in tenths of a decibel). When the
channel’s signal to noise margin goes above this number, the device can attempt to use a
higher transfer rate. Configure the upstream up shift signal to noise margin to be greater
than or equal to the target upstream signal to noise margin and less than or equal to the
maximum upstream signal to noise margin.
Down-shift
Noise Margin
(0.1 dB)
The upstream down shift signal to noise margin (measured in tenths of a decibel). When
the channel’s signal to noise margin goes below this number, the device shifts to a lower
transfer rate. Configure the upstream down shift signal to noise margin to be less than or
equal to the target upstream signal to noise margin and greater than or equal to the
minimum upstream signal to noise margin.
Downstream The following parameters relate to downstream transmissions.
Max Rate
(kbps)
Type a maximum downstream transfer rate for this port. Configure the maximum
downstream transfer rate to be greater than the maximum upstream transfer rate.
Min Rate
(Kbps)
Type the minimum downstream transfer rate for this port. Configure the minimum
downstream transfer rate to be less than the maximum downstream transfer rate.
Interleave
Delay (ms)
Configure this field when you set the Latency Mode field to interleave. Type the number of
milliseconds of interleave delay to use for upstream transfers. It is recommended that
you configure the same latency delay for both upstream and downstream.
Max SNR (0.1
dB)
Type the maximum downstream signal to noise margin (measured in tenths of a decibel).
Min SNR (0.1
dB)
Type the minimum downstream signal to noise margin (measured in tenths of a decibel).
Configure the minimum downstream signal to noise margin to be less than or equal to the
maximum downstream signal to noise margin.
Target SNR
(0.1 dB)
Type the target downstream signal to noise margin (measured in tenths of a decibel).
Configure the target downstream signal to noise margin to be greater than or equal to
the minimum downstream signal to noise margin and less than or equal to the maximum
downstream signal to noise margin.
RA Mode Select the downstream rate adaptation setting.
Select fix to not use any rate adaptation.
Select startup to use rate adaptation at initialization.
Select runtime to use rate adaptation at any time while the connection is up.
Up-shift Noise
Margin (0.1
dB)
The downstream up shift signal to noise margin (measured in tenths of a decibel). When
the channel’s signal to noise margin goes above this number, the device can attempt to
use a higher transfer rate. Configure the downstream up shift signal to noise margin to be
greater than or equal to the target downstream signal to noise margin and less than or
equal to the maximum downstream signal to noise margin.
Table 155
ADSL Profile (continued)
LABEL DESCRIPTION