Maintenance Description
Issue 8.0 July 2002
9-83
OC-48 Optical Parameters 9
The following OC-48 optical parameters are monitored continuously to detect
degraded performance of the laser:
â– Laser Bias Current: This parameter indicates whether the system optics
are working within normal margins (in range or out of range). The upper
limit is 1.5 times the initial factory (nominal) value. There is no lower limit.
â– Optical Transmit Power: This parameter indicates whether the signal
power (facet power) generated by the laser is within normal margins (in
range and out of range). The upper limit is 0.8 dBm above the initial factory
(nominal) value, and the lower limit is 1.0 dBm below the initial factory
(nominal) value.
â– Optical Power Receive: This parameter is not an absolute measure of the
received optical power and, therefore, should not be used as a proactive
performance-monitoring parameter. The optical power receive parameter
indicates whether the received optical power is currently within the nominal
sensitivity limits of the receiver (in range or out of range). The optical power
receive parameter can be used with other proactive
performance-monitoring parameters to isolate the source of an impending
high-speed failure.
Threshold crossing alerts (TCAs) are generated if an OC-48 optical parameter
exceeds the set thresholds. The generation of TCAs can be enabled or disabled
using the PERFORMANCE-Set-PM Threshold-Optics input.
Section Severely Errored Frame Seconds (SEFS-S) 900 65535
EC-1 Section/ EC-1 Line (B2) Coding Violations (CV-L) 16383 1048575
Line EC-1 Line (B2) Errored Seconds (ES-L) 900 65535
EC-1 Line (B2) Severely Errored Seconds (SES-L) 900 65535
EC-1 Line (B2) Unavailable Seconds (UAS-L) 900 65535
DS3 Line/Path DS3 Line Errored Seconds (ES-L) 900 65535
DS3 Path Coding Violations (CV-P) 16383 1048575
DS3 Path Errored Seconds (ES-P) 900 65535
DS3 Path Severely Errored Seconds (SES-P) 900 65535
DS3 Path Severely Errored Frame/AIS Seconds (SAS-P) 900 65535
DS3 Path Unavailable Seconds (UAS-P) 900 65535
Table 9-13. Performance-Monitoring Parameters
Maximum Counts
Facility Measured Parameter
Current
Quarter Hour
Current
Day
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