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Cisco ONS 15454 SDH Reference Manual, R4.6
April 2008
Chapter 15 Performance Monitoring
15.6.2 STM-1E Card Performance Monitoring Parameters
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.
RS-EB Regenerator Section Errored Block (RS-EB) indicates that one or more
bits are in error within a block.
Table 15-30 Multiplex Section PM Parameters for the Near-End
and Far-End STM-1E Cards
Parameter Definition
MS-ES Multiplex Section Errored Second (MS-ES) is a one-second period with
one or more errored blocks or at least one defect.
MS-ESR Multiplex Section Errored Second Ratio (MS-ESR) is the ratio of errored
seconds to total seconds in available time during a fixed measurement
interval.
MS-SES Multiplex Section Severely Errored Second (MS-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. For more information, see ITU-T G.829
Section 5.1.3.
MS-SESR Multiplex Section Severely Errored Second ratio (MS-SESR) is the ratio
of SES to total seconds in available time during a fixed measurement
interval.
MS-BBE Multiplex Section Background Block Error (MS-BBE) is an errored block
not occurring as part of an SES.
MS-BBER Multiplex Section Background Block Error Ratio (MS-BBER) 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.
MS-UAS Multiplex Section Unavailable Seconds (MS-UAS) is a count of the
seconds when the section was unavailable. A section becomes unavailable
when ten consecutive seconds occur that qualify as MS-SESs, and it
continues to be unavailable until ten consecutive seconds occur that do not
qualify as MS-SESs. When the condition is entered, MS-SESs decrement
and then count toward MS-UAS.
MS-EB Multiplex Section Errored Block (MS-EB) indicates that one or more bits
are in error within a block.
Table 15-29 Regenerator Section PM Parameters for the Near-End STM-1E Cards (continued)
Parameter Definition