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Chapter 5. Statistics
61200659L1-1 MX2800 STS-1 User Manual 5-13
Figure 5-12 on page 5-14 for examples of the VT performance
parameter screens.
Condition Description
CV (Coding Violation)
The number of coding violations encountered at
the VT layer.
ES (Errored Seconds)
Number of seconds with one or more coding
violations or one or more incoming defects (e.g.,
AIS, LOP) at the VT layer.
SES (Severely Errored Seconds)
Number of seconds with X or more coding
violations are the VT layer, or a second during
which at least one or more incoming defects at the
VT layer has occurred. Values of X vary
depending on the line rate and the Bit Error Rate.
UAS (Unavailable Seconds)
Time in seconds that the VT layer has been
unavailable for data delivery.
The count given reflects the number of times the alarm or state has
occurred (rather than the number of seconds the alarm was active).