Black Box LRU4240 - Manual (Page 90)

78 SALES: 0870 90 10 750 Dual Trunk E1 Router User’s Guide
Dual Trunk E1 Router
Performance Data Report Events
Event Log
The Event Log feature is accessed through Menu-3Z. The Event Log is a running list of system
events such as power on, power off, errors, configuration changes, and test status. When you access
the Event Log, this information is displayed in a table as each even occurs. A complete list of
events indicated by the Event Log are given in the Menu 3Z.
Table 9-2 Menu-3 Performance Data Report Events
Event Description
Unavailable Signal State This state is declared at the onset of ten consecutive SESs.
Payload Loopback Actuated The unit is in Payload Loopback.
Current Interval Timer Displays the amount of time in a current interval, 0 - 899 seconds.
Errored Seconds (ES) A second with one or more CRC or CRC-4 errors.
Unavailable Seconds (UAS) The number of seconds elapsed after 10 consecutive SES events are
received.
Severely Errored Seconds (SES) A second during which 832 or more CRC-4 violations or OOF events
have occurred.
Loss of Frame Count (LOFC) The number of times Loss of Frame is declared.
Controlled Slip Seconds (CSS) The number of seconds in an interval in which a controlled slip occurred.
Background Block Error (Background block errors/number of available blocks)*100.
Number of available blocks is (number of available seconds)*1000.