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Cisco ONS 15454 SDH Reference Manual, R4.6
April 2008
Chapter 15 Performance Monitoring
15.8.6 Optical Service Channel Card Performance Monitoring Parameters
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-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.
Table 15-76 Near-End or Far-End Multiplex Section PM Parameters for OSCM
and OSC-CSM Cards
Parameter Definition
MS-EB Multiplex Section Errored Block (MS-EB) indicates that one or more bits
are in error within a block.
MS-BBE Multiplex Section Background Block Error (MS-BBE) is an errored block
not occurring as part of an SES.
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-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-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.
Table 15-75 Near-End Regenerator Section PM Parameters for OSCM and OSC-CSM Cards (continued)
Parameter Definition