15-6
Cisco ONS 15454 SDH Reference Manual, R4.6
April 2008
Chapter 15 Performance Monitoring
15.4.1 E1-N-14 Card and E1-42 Card Performance Monitoring Parameters
E1 (Tx or Rx) P-AISS AIS Seconds Path (P-AISS) is a count of one-second intervals containing
one or more AIS defects.
E1 (Tx or Rx) P-ESR Path Errored Second Ratio (P-ESR) is the ratio of errored seconds to total
seconds in available time during a fixed measurement interval.
E1 (Tx or Rx) P-SESR Path Severely Errored Second Ratio (P-SESR) is the ratio of SES to total
seconds in available time during a fixed measurement interval.
E1 (Tx or Rx) P-BBER Path Background Block Error Ratio (P-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 15-4 VC-12 Low-Order Path PM Parameters for the Near-End and Far-End E1-N-14 Cards
and E1-42 Cards
Parameter Definition
LP-EB Low-Order Path Errored Block (LP-EB) indicates that one or more bits
are in error within a block.
LP-ES Low-Order Path Errored Second (LP-ES) is a one-second period with one
or more errored blocks or at least one defect.
LP-SES Low-Order Path Severely Errored Seconds (LP-SES) is a one-second
period containing greater than or equal to 30 percent errored blocks or at
least one defect. SES is a subset of ES.
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-BBE Low-Order Path Background Block Error (LP-BBE) is an errored block
not occurring as part of an SES.
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 15-3 Transmit and Receive CEPT and CRC4 Framing Path PM Parameters
for the Near-End and Far-End E1-N-14 Cards and E1-42 Cards (continued)
Parameter Definition
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