Nortel Networks OPTera Metro 3500 - Manual (Page 152)

2-114 Operation, administration, and maintenance (OAM) features
OPTera Metro 3500 Multiservice Platform NTRN10AN Rel 12.1 Standard Iss 1 Apr 2004
Performance monitoring threshold crossing alerts (TCA)
This feature groups together TCAs to minimize the number of alarms raised
from a particular facility. Summary alarms are reported per facility and are
raised when one or more TCAs have been raised for the facility within a
collection period (15-min. or 1-day).
When monitored performance monitoring (PM) counts exceed their
provisioned thresholds, the system generates a threshold crossing report. You
can provision the report type to one of the following options:
• threshold crossing alert (TCA) (default report type)
• TCA summary alarm
• both TCA and TCA summary alarm
• no reporting
Report type provisioning is supported for the following facilities: OC-3,
OC-12, OC-48, OC-192, STS-1, STS-3c, STS-12c, STS24c, STS48c, WAN,
FC, ETH and EC-1.
Note 1: TCA summary alarms will not be supported on DS1 and DS3
facilities.
Note 2: TCA summary alarms for OC3 facilities is supported on the
OC3x4 cards only.
You provision the report type for each facility type and location based on the
collection period (15-minute or 1-day). Report type provisioning is not valid
for untimed PMs.
Note: Physical PMs do not generate TCA summary alarms. Protection
PMs do not support thresholds and therefore do not generate TCAs or TCA
summary alarms.
TCAs
When TCA reporting is enabled, the system raises a TCA when the
provisioned threshold of a monitored parameter is exceeded during a
collection period. Multiple TCAs can be raised against a facility within a
single collection period. For example, two separate TCAs for two section PM
parameters can be raised during a single collection period for the same facility.
TCA summary alarms
The TCA summary alarms provide a first alert notification to maintenance
personnel that a TCA has been generated. The TCA summary alarms can
enable maintenance personnel to troubleshoot and avoid potentially
service-affecting problems.