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Monitoring the Hotwire DSLAM
5-9
8000-A2-GB26-10
January 1999
Table 5-2. Physical Layer Options (6 of 6)
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 number 1–4 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 24-hour period (data
bucket 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.
dn margin – 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 – 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.
DSL Xmit Status (DSL Transmit Stats) B-B-G
Displays the transmit and receive statistics for each of the DSL ports after selecting a
specific DSL port number.
Enter port number 1–4 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 24-hour period (data
updated every hour).
The counters increment in real time and you may press Ctrl-r at any time to reset the
counters.
Port # – Enter the port number (1–4) you wish to monitor.
dn xmit pwr – Measure of the power level of the downstream signal sent to the SN
(in db).
up xmit pwr – Measure of the power level of the upstream signal sent by the SN (in db).
dn rx gain – Measure of how much amplification was applied to the signal received at
the SN.
up rx gain – Measure of how much amplification was applied to the signal received at
the DSLAM port.
dn att est – Measure of the downstream transmission loss on the DSL line.
up att est – Measure of the upstream transmission loss on the DSL line.