Avaya DEFINITY Server CSI, Руководство по обслуживанию, Страница: 100 / 1930

Maintenance for CSI systems
555-233-119 100
Issue 5 October 2002
9. Repeat Steps 5 through 8 as desired to observe bit error rate
characteristics. Also, wait 1 to 10 minutes between Steps 5 through 7. One
minute without errors translates to better than a 1 in 10 to the eighth error
rate. Ten minutes without errors translates to better than a 1 in 10 to the
ninth error rate.
10. If the test runs for 1 minute with an error count of 0, confirm that the 3-in-24
pattern error detector is operating properly by entering test ds1-loop
<location> inject-single-bit-error. This causes the 3-in-24 pattern
generator on the DS1 circuit pack to inject a single-bit error into the
transmit pattern. Type list meas ds1 summary <location> to display the
bit error count. If a count greater than 1 is displayed, replace the ICSU and
retest. If the problem continues, replace the DS1 circuit pack.
Bit Error Count Cumulative
count of
detected
errors If there are no wiring problems, the counter
remains at 0.
A count that pegs at 65535 or continues to
increment by several hundred to several thousand
on each list meas
command execution indicates
intermittent or corroded connections, severe
crosstalk, or impedance imbalances between the
two conductors of the receive pair or the transmit
pair. Wiring may need replacement.
Note that “ESF error events” counter and the ESF
performance counter summaries (“errored
seconds”, “bursty errored seconds”, and so forth)
will also increment. These counters are not used
with the loopback jack tests. However, they will
increment if errors are occurring. Counters should
be cleared following the test.
Table 8. DS1 Span Troubleshooting — Continued
Field Function Indication
Continued on next page