4. Monitoring the Hotwire DSL System
4-12
April
2002
8000-A2-GB26-70
DSL Error Stats
B-B-F
Displays the error performance (margin) rates for each of the DSL ports after selecting a
specific DSL port number. Margin is a measure of performance.
Enter port name (for example, dsl1:1 through dsl12:1 for 12-port cards) to see the fields
for current 15-minute period (real-time count of events during the past 0–15 minutes),
previous 15-minute period (data updated every 15 minutes), previous 1-hour period (data
updated every hour), and current day, starting at 12:01 a.m. (data updated every hour). A
margin of 0 db equals an expected bit error rate of 10
-7
. (The higher the margins, the
fewer the errors.)
The counters increment in real time and you may press Ctrl-r at any time to reset the
counters.
Port Name – Enter port name (for example, dsl1:1 through dsl12:1 for 12-port cards) you
wish to monitor.
dn margin
1
– Measure of the noise margin on the specified port in the downstream
direction. A positive margin number reflects a lower error rate with a higher tolerance.
up margin
1
– Measure of the noise margin on the specified port in the upstream
direction. A positive margin number reflects a lower error rate with a higher tolerance.
dn err rate – This statistic is not available for this release and an NA appears for each
time period.
up err rate – Block error rate in upstream direction. Error rate = bad blocks/good blocks
and is expressed as A x 10
-B
.
dn err secs – Count of the number of down error seconds with at least one block error in
the downstream data path.
up err secs – Count of the number of up error seconds with at least one block error in the
upstream data path.
dn svr err sec – Count of the number of seconds with at least 800 block errors in the
downstream data path.
up svr err sec – Count of the number of seconds with at least 800 block errors in the
upstream data path.
1
Does not display for Model 8303/8304 IDSL cards.
Table 4-2.
Physical Layer Options (7 of 8)
