# Table 15-8 on – Cisco ONS 15454 SDH User Manual

## Page 9

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**15-9**

**Cisco ONS 15454 SDH Reference Manual, R4.6**

**April 2008**

**Chapter 15 Performance Monitoring**

**15.4.2 E3-12 Card Performance Monitoring Parameters**

LP-UAS

Low-Order Path Unavailable Seconds (LP-UAS) is a count of the seconds

when the VC path was unavailable. A low-order path becomes unavailable

when ten consecutive seconds occur that qualify as LP-SESs, and it

continues to be unavailable until ten consecutive seconds occur that do not

qualify as LP-SESs.

LP-ESR

Low-Order Path Errored Second Ratio (LP-ESR) is the ratio of errored

seconds to total seconds in available time during a fixed measurement

interval.

LP-SESR

Low-Order Path Severely Errored Second Ratio (LP-SESR) is the ratio of

SES to total seconds in available time during a fixed measurement

interval.

LP-BBER

Low-Order Path Background Block Error Ratio (LP-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.

**Table 15-8 VC4 High-Order Path PM Parameters for the Near-End and Far-End E3-12 Card**

**Parameter**

**Definition**

HP-EB

High-Order Path Errored Block (HP-EB) indicates that one or more bits

are in error within a block.

HP-BBE

High-Order Path Background Block Error (HP-BBE) is an errored block

not occurring as part of an SES.

HP-ES

High-Order Path Errored Second (HP-ES) is a one-second period with one

or more errored blocks or at least one defect.

HP-SES

High-Order Path Severely Errored Seconds (HP-SES) is a one-second

period containing 30 percent or more errored blocks or at least one defect.

SES is a subset of ES.

HP-UAS

High-Order Path Unavailable Seconds (HP-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.

HP-ESR

High-Order Path Errored Second Ratio (HP-ESR) is the ratio of errored

seconds to total seconds in available time during a fixed measurement

interval.

HP-SESR

High-Order Path Severely Errored Second Ratio (HP-SESR) is the ratio

of SES to total seconds in available time during a fixed measurement

interval.

HP-BBER

High-Order Path Background Block Error Ratio (HP-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.

**Table 15-7 VC3 Low-Order Path PM Parameters for the Near-End and Far-End E3-12 Card (continued)**

**Parameter**

**Definition**