Figure 15-1 Tcas Displayed In Ctc; Table 15-1 Electrical Cards That Report Rx And Tx Direction For Tcas; Chapter 15 Performance Monitoring - Cisco ONS 15454 Reference Manual

15.1 15.1 Threshold Performance Monitoring
During the accumulation cycle, if the current value of a PM parameter reaches or exceeds its
corresponding threshold value, a threshold crossing alert (TCA) is generated by the node and displayed
by 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. If zero is entered as the threshold
value, generation of TCAs is disabled, but performance monitoring continues.
Change the threshold if the default value does not satisfy your error monitoring needs. For example,
customers with a critical DS-1 installed for 911 calls must guarantee the best quality of service on the
line; therefore, they lower all thresholds so that the slightest error raises a TCA.
When TCAs occur, they appear in CTC. An example is T-UASP-P in the Cond column (shown in
Figure
is appended to the TCA description, as indicated by the red circles in
the TCA is associated with the receive direction, and TX indicates that the TCA is associated with the
transmit direction.
Figure 15-1 TCAs Displayed in CTC
Table 15-1
Table 15-1 Electrical Cards that Report RX and TX Direction for TCAs
Card Line
Near End
RX
DS1-14 YES
DS1N-14 YES
Cisco ONS 15454 Reference Manual, R7.0.1
15-2
15-1), where the "T-" indicates a threshold crossing. For certain electrical cards, "RX" or "TX"
shows the electrical cards for which RX and TX are appended to the TCA descriptions.
Far End
TX RX TX
— YES —
— YES —
Path
Near End
RX TX
YES YES
YES YES
Chapter 15 Performance Monitoring
Figure 15-1. The RX indicates that
Far End
RX TX
YES —
YES —
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