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Cisco ONS 15310-MA SDH Reference Manual, Release 9.1 and Release 9.2
78-19417-01
Chapter 11 Performance Monitoring
Performance Monitoring Parameter Definitions
SESR-P Path Severely Errored Second Ratio (SESR-P) is the ratio of SES to total
seconds in available time during a fixed measurement interval.
SESR-PM Path Monitoring Severely Errored Seconds Ratio (SESR-PM) indicates the
severely errored seconds ratio recorded in the OTN path during the PM
time interval.
SES-SM Section Monitoring Severely Errored Seconds (SES-SM) indicates the
severely errored seconds recorded in the OTN section during the PM time
interval.
Tx AISS-P Transmit Path Alarm Indication Signal (AISS-P) means that an alarm
indication signal occurred on the transmit end of the path. This parameter
is a count of seconds containing one or more AIS defects.
Tx BBE-P Transmit Path Background Block Error (BBE-P) is an errored block not
occurring as part of an SES.
Tx ES-P Transmit Path Errored Second (ES-P) is a one-second period with one or
more errored blocks or at least one defect.
Tx ESR-P Transmit Path Errored Second Ratio (ESR-P) is the ratio of errored seconds
to total seconds in available time during a fixed measurement interval.
Tx SES-P Transmit Path Severely Errored Seconds (SES-P) is a one-second period
containing 30 percent or more errored blocks or at least one defect; SES is
a subset of ES.
Tx SESR-P Transmit Path Severely Errored Second Ratio (SESR-P) is the ratio of SES
to total seconds in available time during a fixed measurement interval.
Tx UAS-P Transmit Path Unavailable Seconds (UAS-P) 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.
Tx BBER-P Transmit Path Background Block Error Ratio (BBER-P) is the ratio of BBE
to total blocks in available time during a fixed measurement interval. The
count of total blocks excludes all blocks during SESs.
Tx EB-P Transmit Path Errored Block (EB-P) indicates that one or more bits are in
error within a block.
UAS Path Unavailable Seconds (UAS) is a count of the seconds when the VC
path was unavailable. A high-order path becomes unavailable when ten
consecutive seconds occur that qualify as HP-SESs, and it continues to be
unavailable until ten consecutive seconds occur that do not qualify as
HP-SESs.
UASCP-P Unavailable Seconds CP-bit Path (UASCP-P) is a count of one-second
intervals when the DS3 path is unavailable. A DS3 path becomes
unavailable when ten consecutive SESCP-Ps occur. The ten SESCP-Ps are
included in unavailable time. After the DS3 path becomes unavailable, it
becomes available when ten consecutive seconds with no SESCP-Ps occur.
The ten seconds with no SESCP-Ps are excluded from unavailable time.
Table 11-2 Performance Monitoring Parameters (continued)
Parameter Definition
