Performance Monitoring
LTPH-TP-1044-01, Issue 1
32
April 6, 2001
HXU-358 V1.04
Table 5.
T1/E1 and DS3 Error Definitions
Error Type
Description
T1/E1 Ports
ES
Errored Seconds—The sum of the ES-L and ES-P counts
detected on the DS1 input. Errors included are: DS1 Frame
errors, BPV, and ESF CRC errors.
SES
Severely Errored Seconds—This value is the sum of the DS1
SES-L and SES-P counts.
CV
Code Violation—Total count of DS1/E1 code violation.
DS3 Port
ES-L
Errored Seconds - Line: Count of seconds containing one or
more Bipolar Violations (BPVs), Excessive Zeroes (EXZs) or
LOS defects. A BPV is the occurrence of a pulse of the same
polarity as the previous pulse. An EXZ is the occurrence of any
zero string length
≥
3.
CV-L
Code Violation - Line: Total BPV and EXZ count.
SES-L
Severely Errored Seconds - Line: Count of seconds with BPV
plus EXZ
≥
44 or LOS
≥
1.
LOSS-L
Loss of Signal Second - Line: Count of 1-second intervals
containing one or more LOS defects.
SASP-P
SEF/AIS Second C-bit Parity: Count of seconds containing one
or more Severely Errored Frames (SEF) or Alarm Indication
Signal (AIS) defects.
CVP-P
Code Violation P-bit Parity: Count of P-bit parity check code
violations. P-bit parity error is the occurrence of a received
P-bit parity error on an M-frame (the locally calculated parity
does not match the received parity bits).
ESP-P
Errored Second P-bit Parity: Count of seconds containing one
or more P-bit parity errors, or one or more SEF or AIS defects.
SESP-P
Severely Errored Second P-bit Parity: Count of seconds
containing more than 44 P-bit parity errors or one or more SEF
or AIS defects.
UASP-P
Unavailable Seconds P-bit Parity: Count of 1-second intervals
during which the DS3 path is unavailable.
CVCP-P
Code Violation CP-bit Parity: Count of CP-bit parity code
violations.
Continued
