Chapter 11 Performance Monitoring

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 is 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. If 0 is entered as the threshold value, the PM parameter is disabled.

Change the threshold if the default value does not satisfy your error monitoring needs. For example, customers with a critical E1 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, CTC displays them in the Alarms tab. For example, in Figure 11-1, T-UASP-P is shown under the Cond column. The “T-” indicates a threshold crossing alert.

For the E1 and E3/DS3 electrical ports on the 15310-MA SDH E1_21_E3_DS3_3 and

E1_63_E3_DS3_3 cards, RX or TX is appended to the TCA description (see the red circles in

Figure 11-1). RX indicates that the TCA is associated with the receive direction, and TX indicates the TCA is associated with the transmit direction.

Figure 11-1 TCAs Displayed in CTC

For electrical ports, only the receive direction is detected and appended to TCA descriptions. The E1 and E3/DS3 ports for which RX is appended to TCA descriptions are shown in Table 11-1.

Table 11-1

Electrical Ports that Report RX Direction for TCAs

 

 

 

 

 

 

 

Port

 

Line

 

Path

 

 

 

 

 

 

 

 

 

Near End

Far End

Near End

Far End

 

 

 

 

 

 

E1

 

YES

YES

YES

YES

 

 

 

 

 

 

DS-3

 

YES

YES

YES

 

 

 

 

 

 

E3

 

YES

YES

YES

YES

 

 

 

 

 

 

Cisco ONS 15310-MA SDH Reference Manual, Release 9.1 and Release 9.2

11-2

78-19417-01

 

 

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Cisco Systems 15310-MA manual Port Line Path Near End Far End, Yes, 11-2

15310-MA specifications

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