Product specifications
Appendix B: Performance Monitor 
84 
May 2011 
Current errored seconds (ES) 
An errored second is any second containing one or more CRC error events, or one or more 
controlled slip events. The data is collected for the current 15-minute interval. 
Current unavailable seconds (UAS) 
An unavailable second is any second in which a failed signal state exists.. The data is collected 
for the current 15-minute interval. 
Long-term errored seconds (LONG ES) 
The total number of ES in the current powered-up interval. 
Long-term fail seconds (LONG UAS) 
The total number of UAS in the current powered-up interval. 
Current seconds (CURR SEC) 
The number of seconds in the current measurement interval. A measurement interval has 900 
seconds (15 minutes). 
Long term interval (LONG SEC) 
The number of 15-minute intervals in the powered-up period. 
Performance Monitor Brief Table 
Display Description  Range 
BPV Cnt  The total number of BPV errors during the last second. The display 
is updated every second. CRC-4 must be disabled. 
0-65535 
CRC4 
Cnt 
The number of CRC error events recorded during the last second. 
The display is updated every second. CRC-4 must be enabled. 
0-1024 
CURR 
ES 
Number of ES measured during the current 15-minute interval. The 
display is updated every second. 
0-900 
CURR 
UAS 
Number of UAS measured during the current 15-minute interval. 
The display is updated every second. 
0-900 
LONG 
ES 
Number of ES measured during the current powered-on interval. 
The display is updated every 15 minutes. 
0-65535 
LONG 
UAS 
Number of UAS measured during the current powered-on interval. 
The display is updated every 15 minutes. 
0-65535 
CURR 
SEC 
The time in seconds that expired from the start of the current 15-
minute interval. The display is updated every second. 
0-900 
LONG 
SEC 
The number of 15-minute intervals that expired from the start of the 
current powered-on interval. The display is updated every 15 
minutes. 
0-65535 










