Appendix B: Performance Monitor
128
November 2001
Performance Monitoring
When the CRC-4 function enabled, the ETU-01A stores El line
statistics for the E1 link interface. This permits real-time monitoring of data
transmission performance.
The performance parameters statistics are listed below:
Current CRC-4 error events (CRC Cnt)
A CRC-4 error event is any multiframe containing a CRC error event.
The number of CRC events in the current second are collected in the
current CRC error events register. The register is updated every second.
Note Register contents can be displayed at any time from the LCD, a
connected console, or via SNMP. When the CRC error events are
displayed on the front-panel LCD, the register can be reset by pressing
ENTER when the RESET menu item is displayed.
When the CRC-4 function is disabled, the ETU-01A will be able to
detect bipolar violations and store them in a register for 1 second.
Bipolar violations (BPV Cnt) count (BPV last second)
The total number of bipolar violations counted in the last second. This
number is updated every second.
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