EXFO MaxTester 635 - Manual (Page 309)

Running DSL/IP Tests and Viewing Results
Copper and VDSL2/ADSL2+ Multi-play Test Set 301
DSL Statistics
DSL Statistics
The DSL Statistics tab allows you to view transfer mode statistics and DSL
counters.
When the Test Interface for Auto Test or Manual Test is set to ADSL2+ or
VDSL2 bonding mode, there will be 2 pages of results, one for each DSL
line-pair.
To access the second-pair results, press the Pair 1/2 function key at the
bottom-right of the screen.

DSL Counters lists the Local and Remote results
for the following counters:

CRC is the cyclical redundancy check
Interleaved/Fast counter.

FEC is the Reed Solomon forward error
correction.

Error Seconds is the number of seconds
when code violation is detected.

HEC is the header error check (HEC)
Interleaved/Fast counter. Available only in
ATM connection mode.

Parameter - Received/Transmitted

Bytes records the number of active (non-idle) PTM/ATM cells or
frames on a channel.

Packets displays the number of packets.

DSL Transport options include PTM (packet transfer mode), ATM
(asynchronous transfer mode), and ATM/PTM.

Sync loss count is the number of times the unit lost synchronization.