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Monitoring the HotWire DSLAM
7-20
8000-A2-GB20-20
November 1997
Table 7-7. 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 one 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.)
You may enter Ctrl-r at any time to reset counters.
Error Rate Definition:
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 (dn err mins for Model 8540) – Count of the number of down error
seconds with at least one block error.
up err secs – (up err mins for Model 8540) – Count of the number of up error seconds
with at least one block error.
dn svr err sec – This statistic is not available for this release and an NA appears for
each time period.
up svr err sec – Count of the number of seconds with at least 800 block errors.
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 one hour period (data updated every hour), and
24-hour period (data updated every hour).
You may enter Ctrl-r at any time to reset counters.
dn xmit pwr – Measure of the power level of the downstream signal sent to the RTU (in
db).
up xmit pwr – Measure of the power level of the upstream signal sent to the RTU (in
db).
dn rx gain – Measure of how much amplification was applied to the signal received at
the RTU.
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.