Cisco ONS 15454 SDH Specifications Page 316

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Cisco ONS 15454 SDH Installation and Operations Guide, R3.3
May 2002
Chapter 8 SDH Performance Monitoring
Changing Thresholds
8.2 Changing Thresholds
Thresholds are used to set error levels for PMs. During the accumulation cycle, if the current value of a
performance monitoring parameter reaches or exceeds its corresponding threshold value, a threshold
crossing alert (TCA) is generated by the node and sent to CTC. TCAs provide early detection of
performance degradation. When a threshold is crossed, the node continues to count the errors during a
given accumulation period.
You can program PM threshold ranges from the Provisioning > Threshold tabs on the card view. For
procedures on provisioning card thresholds, such as line and path, see Chapter 7, Card Provisioning.
Figure 8-8 shows the Provisioning > Threshold tabs for an STM-64 card. Figure 8-9 on page 8-13 shows
the Provisioning > Threshold tabs for a DS3i card.
Figure 8-8 Threshold tab for setting threshold values (Example of an STM64 card)
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Thresholds tab Provisioning tab Card view
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