Datasheet

15-13
Cisco ONS 15454 SDH Reference Manual, R7.0
October 2008
Chapter 15 Performance Monitoring
15.4 Performance Monitoring Parameter Definitions
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 DS-3 path is unavailable. A DS-3 path becomes
unavailable when ten consecutive SESCP-Ps occur. The ten SESCP-Ps are
included in unavailable time. After the DS-3 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.
UASCP-PFE Unavailable Seconds CP-bit Far End Path (UASCP-PFE) is a count of
one-second intervals when the DS-3 path becomes unavailable. A DS-3
path becomes unavailable when ten consecutive far-end CP-bit SESs occur.
The ten CP-bit SESs are included in unavailable time. After the DS-3 path
becomes unavailable, it becomes available when ten consecutive seconds
occur with no CP-bit SESs. The ten seconds with no CP-bit SESs are
excluded from unavailable time.
UAS-P Path Unavailable Seconds (UAS-P) is a count of the seconds when the path
was unavailable. A path becomes unavailable when ten consecutive
seconds occur that qualify as P-SESs, and it continues to be unavailable
until ten consecutive seconds occur that do not qualify as P-SESs.
UAS-PFE Far-End Path Unavailable Seconds (UAS-PFE) is a count of the seconds
when the path was unavailable. A path becomes unavailable when ten
consecutive seconds occur that qualify as P-SESs, and it continues to be
unavailable until ten consecutive seconds occur that do not qualify as
P-SESs.
UAS-PM Path Monitoring Unavailable Seconds (UAS-PM) indicates the unavailable
seconds recorded in the OTN path during the PM time interval.
Table 15-3 Performance Monitoring Parameters (continued)
Parameter Definition