Zyxel VES-1624FT-55A [118/312] Chapter 17 xdsl profiles setup

Zyxel VES-1624FT-55A [118/312] Chapter 17 xdsl profiles setup
Chapter 17 xDSL Profiles Setup
VES-1624FT-55A User’s Guide
118
Latency Mode This is the DSL latency mode (Fast or Interleave) for the ports that belong to
this profile.
Down/Up Stream
Rate (kbps)
These are the maximum downstream and upstream transfer rates for the ports
that belong to this profile.
Select
Modify
Select a profile’s Select radio button and click Modify to edit the profile.
Select
Delete
Select a profile’s Select radio button and click Delete to remove the profile.
The rest of the screen is for profile configuration.
Name When editing a profile, this is the name of this profile. When adding a profile,
type a name (up to 31 characters) for the profile.
Latency Mode This field sets the DSL latency mode for the ports that belong to this profile.
Select Fast mode to use no interleaving and have faster transmission (a “fast
channel”). This would be suitable if you have a good line where little error
correction is necessary.
Select Interleave mode to use interleave delay when transmission error
correction (Reed-Solomon) is necessary due to a less than ideal telephone line.
See Section 16.3 on page 99 for more on interleave delay.
Up Stream The following parameters relate to upstream transmissions.
Max Rate Type a maximum upstream transfer rate (64 to 128000 Kbps) for this profile.
Configure the maximum upstream transfer rate to be less than the maximum
downstream transfer rate.
Min Rate Type the minimum upstream transfer rate (32 to 128000 Kbps) for this port.
Configure the minimum upstream transfer rate to be less than the maximum
upstream transfer rate.
Interleave Delay Configure this field if you set the Latency Mode field to Interleave. Type the
number of milliseconds (1-255) 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 Type the maximum upstream signal to noise margin (0-31 dB).
Min SNR Type the minimum upstream signal to noise margin (0-31 dB). Configure the
minimum upstream signal to noise margin to be less than or equal to the
maximum upstream signal to noise margin.
Target SNR Type the target upstream signal to noise margin (0-31 dB). 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.
Up Shift SNR The upstream up shift signal to noise margin (0-31 dB). 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 SNR The upstream down shift signal to noise margin (0-31 dB). 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.
Down Stream The following parameters relate to downstream transmissions.
Table 23 xDSL Port Profile (continued)
LABEL DESCRIPTION

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