Data rate prediction, Dsl rate – EXFO VDSL2 User Manual
Page 145
Wideband Tests
Copper, VDSL2, ADSL2+ and IP Triple-Play Test Set
137
Data Rate Prediction
Data Rate Prediction
The data rate prediction test is based on measurements of PSD noise and
attenuation. Considering the fact that all estimates are done from the single
end of the loop, the created report will be presented as a prediction with
reasonable probability.
DSL Rate
The DSL Rate tab allows you to configure parameters and view results for
the current loop topology. The data rate prediction (DRP) test displays the
calculated downstream and upstream rates.
Each parameter on the pane is
described below.
³
Annex defines the modes of
available ADSL Annexes from the
ITU standards.
³
A is ADSL service functioning
over POTS.
³
B activates the ADSL
functionality over ISDN.
³
L Mask 1 assumes an increase in ADSL2 range/distance.
³
L Mask 2 also extends the signal reach but can show an
improvement in the upstream data rate.
³
M allows increased upload speeds from 1 Mbps to 3.5 Mbps.
Available only for ADSL2 and ADSL2+.
³
Technology lists the following values: ADSL, ADSL2, or ADSL2+. If
Annex L is previously selected, ADSL2 is automatically set. If Annex M,
ADSL is not available.