Configuring the Switch
3-72
Monitoring VDSL Performance History
This page displays line and channel performance data information during selected
15 minute intervals over the last 24 hours of switch operation, and during selected
1-day intervals from the current day to 30 days ago.
Command Attributes
• Line – Select the VDSL line from the drop-down list.
• Channel – Select Slow or Fast from the drop-down list.
• Side – This only displays Local. All information displayed is for data
transmission from the switch to the CPE.
• Line Performance Data History Information
For the 15 Min Interval column, interval 1 is the most recent interval; interval 96
is 24 hours ago.
For the 1 Day Interval column, interval 1 is the most recent day; interval 30 is 30
days ago.
- Loss of Frame (LOF) – Number of seconds that there was loss of framing in
the indicated time interval.
- Loss of Signal (LOS) – Number of seconds that there was loss of signal in
the indicated time interval.
- Loss of Power – Number of seconds that there was loss of power in the
indicated time interval.
- Loss of Link – Number of seconds that there was loss of link in the indicated
time interval.
- Errored Second – Number of errored seconds in the indicated time interval.
An errored second is a one-second interval containing one or more CRC
anomalies, or one or more LOS or LOF defects.
- Severely Errored Second – Number of severely errored seconds in the
indicated time interval. An errored second is a one-second interval containing
one or more one or more CRC anomalies, or one or more LOS or LOF
defects.
- Unavailable Second – Count of unavailable seconds in the indicated time
interval.
- Init – Number of line initialization attempts in the indicated time interval. This
count includes both successful and failed attempts.
• Channel Performance Data History Information
- Fixed Octet – Number of corrected octets in the indicated time interval.
- Bad Block – Number of uncorrectable blocks in the indicated time interval.
