Datasheet

15-11
Cisco ONS 15454 SDH Reference Manual, R7.0
October 2008
Chapter 15 Performance Monitoring
15.4 Performance Monitoring Parameter Definitions
RS-EB Regenerator Section Errored Block (RS-EB) indicates that one or more bits
are in error within a block.
RS-ES Regenerator Section Errored Second (RS-ES) is a one-second period with
one or more errored blocks or at least one defect.
RS-ESR Regenerator Section Errored Second Ratio (RS-ESR) is the ratio of errored
seconds to total seconds in available time during a fixed measurement
interval.
RS-SES Regenerator Section Severely Errored Second (RS-SES) is a one-second
period which contains 30 percent or more errored blocks or at least one
defect. SES is a subset of ES.
RS-SESR Regenerator Section Severely Errored Second Ratio (RS-SESR) is the ratio
of SES to total seconds in available time during a fixed measurement
interval.
RS-UAS Regenerator Section Unavailable Second (RS-UAS) is a count of the
seconds when the regenerator section was unavailable. A section becomes
unavailable when ten consecutive seconds occur that qualify as RS-UASs,
and it continues to be unavailable until ten consecutive seconds occur that
do not qualify as RS-UASs.
Rx AISS-P Receive Path Alarm Indication Signal Seconds (AISS-P) means that an
alarm indication signal occurred on the receive end of the path. This
parameter is a count of seconds containing one or more AIS defects.
Rx BBE-P Receive Path Background Block Error (BBE-P) is an errored block not
occurring as part of an SES.
Rx EB-P Receive Path Errored Block (EB-P) indicates that one or more bits are in
error within a block.
Rx ES-P Receive Path Errored Second (ES-P) is a one-second period with one or
more errored blocks or at least one defect.
Rx ESR-P Receive Path Errored Second Ratio (ESR-P) is the ratio of errored seconds
to total seconds in available time during a fixed measurement interval.
Rx SES-P Receive 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.
Rx SESR-P Receive Path Severely Errored Second Ratio (SESR-P) is the ratio of SES
to total seconds in available time during a fixed measurement interval.
Rx UAS-P Receive Path Unavailable Seconds (UAS-P) 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.
Rx BBER-P Receive 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.
Table 15-3 Performance Monitoring Parameters (continued)
Parameter Definition