Dsl statistics – EXFO FTB-635 Wideband Copper and DSL Test Module User Manual
Page 332
xDSL Test Results
324
FTB-635
DSL Statistics
DSL Statistics
The DSL Statistics tab allows you to view transfer mode statistics and DSL
Counters.
When the Line mode is set to ADSL2+ or VDSL2 bonding mode, there will
be 2 sections of results, one for each DSL line-pair.
Transport Type options include ATM (asynchronous transfer mode),
PTM (packet transfer mode) or ATM & PTM.
Vector State (only displayed for single VDSL2 connection) is Active/Not
Active. When Active, the VCE (vector control entity) + DSLAM asks the
CPE for noise samples. The VCE uses the noise samples to calculate
the level of FEXT (far end crosstalk) and to calculate the solution to
mitigate the effects of FEXT.
Sync loss counter is the number of times the unit lost synchronization.
KL0 displays the attenuation the system calculated during the
determination of UPPBO requirements.
EWL is the estimated wire length and is based on the KL0.
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