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15-5
Cisco ONS 15454 SDH Reference Manual, R4.6
April 2008
Chapter 15 Performance Monitoring
15.4.1 E1-N-14 Card and E1-42 Card Performance Monitoring Parameters
Table 15-2 Line PM Parameters for the E1-N-14 Card and E1-42 Card, Near-End
Parameter Definition
Note SDH path PMs do not increment unless IPPM is enabled. See the “15.2 Intermediate-Path
Performance Monitoring” section on page 15-2.
E1 CV-L Code Violation Line (CV-L) indicates the number of coding violations
occurring on the line. This parameter is a count of bipolar violations
(BPVs) and excessive zeros (EXZs) occurring over the accumulation
period.
E1 ES-L Errored Seconds Line (ES-L) is a count of the seconds containing one or
more anomalies (BPV + EXZ) and/or defects (loss of signal) on the line.
E1 SES-L Severely Errored Seconds Line (SES-L) is a count of the seconds
containing more than a particular quantity of anomalies (BPV + EXZ >
2048) and/or defects on the line.
E1 LOSS-L Line Loss of Signal (LOSS-L) is a count of one-second intervals
containing one or more LOS defects.
Table 15-3 Transmit and Receive CEPT and CRC4 Framing Path PM Parameters
for the Near-End and Far-End E1-N-14 Cards and E1-42 Cards
Parameter Definition
Note Under the Provisioning > Threshold tab, the E1-N-14 card and the E1-42 card have
user-defined thresholds for the E-1 Rx path PM parameters. In the Threshold tab, they are
displayed as EB, BBE, ES, SES, and UAS without the Rx prefix.
E1 (Tx or Rx) P-EB Path Errored Block (P-EB) indicates that one or more bits are in error
within a block.
E1 (Tx or Rx) P-BBE Path Background Block Error (P-BBE) is an errored block not occurring
as part of an SES.
E1 (Tx or Rx) P-ES Path Errored Second (P-ES) is a one-second period with one or more
errored blocks or at least one defect.
E1 (Tx or Rx) P-SES Path Severely Errored Seconds (P-SES) is a one-second period containing
30 percent or more errored blocks or at least one defect; SES is a subset
of ES.
E1 (Tx or Rx) P-UAS Receive Path Unavailable Seconds (E1 Rx P-UAS) is a count of
one-second intervals when the E-1 path is unavailable on the signal
receive end. The E-1 path is unavailable when ten consecutive SESs occur.
The ten SESs are included in unavailable time. After the E-1 path becomes
unavailable, it becomes available when ten consecutive seconds occur
with no SESs. The ten seconds with no SESs are excluded from
unavailable time.
Transmit Path Unavailable Seconds (E1 Tx P-UAS) is a count of
one-second intervals when the E-1 path is unavailable on the transmit end
of the signal. The E-1 path is unavailable when ten consecutive SESs
occur. The ten SESs are included in unavailable time. After the E-1 path
becomes unavailable, it becomes available when ten consecutive seconds
occur with no SESs. The ten seconds with no SESs are excluded from
unavailable time.