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Monitoring DS1/T1 Performance
288 Avidia System Configuration and Management User Manual
The following table describes the information displayed after you type the ds1 command.
Information Description
Port The port number for which the statistics are displayed.
Errored Seconds Errored seconds are seconds during which any of the
following occur:
• one or more AIS defects
• one or more controlled slips
• one or more Path code violations
• one or more out-of-frame defects
• one or more bipolar errors (D4 mode only)
Severely Errored Seconds For ESF mode, severely errored seconds are seconds
in which 320 or more Path code violation errors, one
or more out-of-frame defects or an AIS defect occur.
For D4 mode, severely errored seconds are seconds in
which framing errors, out of frame defects, or 1,544 or
more line coding violations occur.
Severely Errored Framing Seconds Severely errored framing seconds are seconds during
which one or more out-of-frame defects or an AIS
defect occurs.
Unavailable Seconds The number of seconds during which the interface was
unavailable. A line becomes unavailable at ten
consecutive severely errored seconds.
Controlled Slip Seconds A second during which one or more controlled slips
occur. A controlled slip is the replication or deletion of
the payload bits in a DS1 frame.
Path Coding Violations Frame synchronization bit errors.
Line Errored Seconds A second during which one or more line code
violations occur.
Bursty Errored Seconds A second during which between 1 and 320 path coding
violations occurs and no severely errored frame
defects or AIS defects occur. This applies to ESF mode
only.
Degraded Minutes This parameter is not currently supported, therefore a
zero displays.
Line Code Violations Bipolar violations or excessive zeroes.