ZyXEL Communications IES-22A User Manual page 134

Chapter 15 xDSL Line Data
Table 30 Basic Setting > xDSL Line Data > Line Performance (continued)
LABEL
Stuc/Stur SES
Stuc/Stur
CRCanomalies
Stuc/Stur
LOSWS
Stuc/Stur UAS
Performance (since
last link up)
ES
SES
CRCanomalies
LOSWS
UAS
Segment
Anomaly
Segment Defect
15 min, 1day history
crc
es
ses
losws
uas
134
DESCRIPTION
The number of Severely Errored Seconds detected by the STU-C and the STU-
R on this DSL port. A Severely Errored Second is defined as a count of 1-
second intervals during which at least 50 CRC anomalies are declared or one or
more LOSW defects are declared. (50 CRC anomalies during a 1-second
interval is equivalent to a 30% errored frame rate for a nominal frame length.)
The number of CRC anomalies detected by the STU-C and the STU-R on this
DSL port.
The number of Loss of Sync Word Failure Seconds detected by the STU-C and
the STU-R on this DSL port.
The number of UnAvailable Seconds.detected by the STU-C and the STU-R on
this DSL port. An Unavailable Second is a count of 1-second intervals for which
the SHDSL line is unavailable. The SHDSL line becomes unavailable at the
onset of 10 contiguous SESs. The 10 SESs are included in the unavailable time.
Once unavailable, the SHDSL line becomes available at the onset of 10
contiguous seconds with no SESs. The 10 s with no SESs are excluded from
unavailable time.
The number of Errored Seconds that have occurred since the last connection
was established.
The number of Severely Errored Seconds that have occurred since the last
connection was established.
The number of CRC anomalies that have occurred since the last connection
was established.
The number of Loss of Sync Word Seconds that have occurred since the last
connection was established.
The number of UnAvailable Seconds.that have occurred since the last
connection was established.
The number of Segment Anomalies that have occurred since the last
connection was established. A segment anomaly indicates that a regenerator
operating on a segment has received corrupted data and therefore the
regenerated data is unreliable.
The number of Segment Defects that have occurred since the last connection
was established. A segment defect indicates that a regenerator has lost SHDSL
synchronization and therefore the regenerated data is unavailable.
This section of the screen displays line performance statistics for the current
and previous 15-minute periods, as well as for the current and previous 24
hours.
STUC: This refers to what is detected by the Central Office (CO) end point.
STUR: This refers to what is detected by the Remote (R) end point.
The number of CRC anomalies detected within the period.
The number of Errored Seconds detected within the period.
The number of Severely Errored Seconds detected within the period.
The number of Loss of Sync Word Seconds detected within the period.
The number of UnAvailable Seconds detected within the period.
IES-708-22A User's Guide