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Monitoring the Hotwire DSLAM
6-7
8000-A2-GB26-00
May 1998
Table 6-2. Physical Layer Options (5 of 5)
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 one to four to see the fields for current 15-minute period (real time
count of events during the past 0 to 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 enter Ctrl-r at any time to reset the
counters.
dn margin – Measure of the noise margin on the specified port in the downstream
direction.
up margin – Measure of the noise margin on the specified port in the upstream
direction.
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 one to four to see the fields for current 15-minute period (real time
count of events during the past 0 to 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 enter Ctrl-r at any time to reset the
counters.
Port # – Enter the port number (1 to 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.