EXFO MaxTester MAX-630 User Manual
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Running DSL/IP Tests and Viewing Results
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MAX-630
DSL Statistics
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.
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.
Performance Counters - Local/Remote
G.INP RTX_TX is the number of frames retransmitted by the
transmitter. The Local number is what is retransmitted from the
CPE to the DSLAM. The Remote value is what is retransmitted from
the DSLAM to the CPE.
Note: The RTX_TX number may contain retransmits not requested by the receiver
(that is, the retransmission request channel got corrupted and a
retransmission was sent automatically) resulting in an incremental value
even though the same frame ID was retransmitted multiple times.
G.INP RTX_C is a counter that is increased each time a frame is
detected in error and has successfully been corrected by a
retransmission. The Local number is received by the CPE, the
Remote value received by the DSLAM.
G.INP RTX_UC is a counter that is increased each time a frame is
detected in error and has not been corrected by one or more
retransmissions within the maximum delay period. The Local
number is received by the CPE, the Remote value received by the
DSLAM.
Note: The RTX_TX may not equal RTX_C + RTX_UC because of the infrequent
reboot nature of the DSLAM and the double-counting that the RTX_TX
counter might do.