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DL3800 DS1 Inverse Multiplexer User Guide—February 1999
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Figure 4-6
STATISTICS MENU (Screen #2)
Table 4-3 STATISTICS MENU Error Types
Parameter
Definition
CV
A Code Violation. CV is a count of Frame synchronization bit errors (FE) in the Super
Frame (SF) format, or a count of the CRC-6 errors in the Extended Super Frame (ESF)
format occurring during the accumulation period.
ES
An Errored Second. In the case of ESF, the count of one-second intervals containing one
or more CRC-6 errors, or one or more CS events, or one or more SEF events. An SEF is
a severely errored frame in which there are no LOS and no AIS events.
ES-A
In ESF format only, this is the count of one-second intervals with exactly one CRC-6, no
SEF, and no LOS events.
ES-B
In ESF format only, this is a count of one-second intervals with no less than two and not
more than 319 CRC-6 errors, no SEF events, and no LOS events.
SES
In ESF format, Severely Errored Seconds are defined as a count of one-second intervals
with 320 or more CRC-6 errors, or an SEF defect. In SF, it is the count of one-second
intervals with eight or more FE events, or an SEF defect.
SAS
SEF/AIS Seconds. In ESF only, this parameter is the count of one-second intervals
containing one or more SEF defects or one or more AIS (Alarm Indication Signal)
defects.
AISS
This parameter is a count of one-second intervals containing one or more AIS defects.
Summary of Contents for DL3800 DS1
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