Verilink 1558D (34-00255) Product Manual User Manual
Page 40
LAPS Operation 4-14
1558D APS CSU/DSU
desired test time. The choices are 15 minutes, 30 min-
utes, 1 Hour, 24 Hours, and Continuous.
4. After performing Steps 1 - 3, move the cursor highlight
to either the Test Time or Pattern field and then momen-
tarily depress the
ately begin to generate the selected pattern on the
selected path for the selected time interval. Observing the
Near and Far end CRC errors counters will assist the user
in determining if the error problem is occurring in the
transmit or receive path.
The LAPS system cannot generate loops while a
BERT test is in process. Also, if the user exits the
‘Maintenance’ screen while a BERT is running,
the BERT stops.
While running the test, the user may reset the CRC error
counters by moving the cursor highlight to the Reset Errors
field and momentarily depress the
reset the Near and Far CRC error counters to zero. Perform-
ing an error reset does not stop the BERT test in progress.
The user may stop the BERT test at any time by simply
moving the cursor highlight to either the Pattern or Test
Time command fields and then depress the
system responds by turning off the Runtime clock display.
To restart the test, simply depress the
The system responds by applying the selected BERT pattern
and restarting the Runtime clock display.