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Maintenance Description
9-40 Issue 1 December 1997
DS3 Line Parameters 9
Coding Violations (CV-L) 9
This parameter is a count of B3ZS bipolar violations (BPV) occurring over the
accumulation period. BPVs that are part of the zero substitution code are
excluded.
Errored Seconds (ES-L) 9
This parameter is a count of seconds containing one or more BPVs, or one or
more LOS (from the DSX-3) defects.
Severely Errored Seconds (SES-L) 9
This parameter is a count of seconds during which BPVs exceed 44, or one or
more LOS defects occur.
Performance Monitoring Data Storage and
Reports 9
The DDM-2000 OC-12 Multiplexer provides current quarter-hour and current day
registers for all accumulated performance parameters. Previous quarter-hour
registers for the preceding 8 hours and previous day registers also are provided.
The DDM-2000 OC-12 Multiplexer has the capability to initialize the current
registers through the CIT locally or remotely at any time, as well as to report the
contents of any register at any time. Refer to the init-pm, rtrv-pm-line,
rtrv-pm-sect, rtrv-pm-sts1, rtrv-pm-t3, and rtrv-pm-tca commands
in the "Commands and Reports" section of this manual.
Performance Monitoring During Failed
Conditions 9
When the DDM-2000 OC-12 Multiplexer detects a trouble condition, the system
stops accumulating affected performance parameters. Parameters that continue
to provide useful information are accumulated during the trouble condition.
Performance Parameter Thresholds 9
The DDM-2000 OC-12 Multiplexer provides performance thresholds to alert
maintenance staff of degraded transmission. Whenever the threshold for a
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