FCD-IPM Installation and Operation Manual Chapter 4 Configuration
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Interval Parameters Table 4-10. Interval Parameters
Parameters Description
Current Errored Seconds (ES) An errored second is any second containing one or more CRC error
events, one or more OOF events, or one or more controlled slip
events.
Unavailable Seconds Out-Of-
Frame (UAS)
An unavailable second out-of-frame is any second in which a failed
signal state exists. A failed signal state is declared when 10 consecutive
severely errored seconds (SES) occur, and is cleared after 10
consecutive seconds of data are processed without a SES.
Severely Errored Seconds
(SES)
A SES is a second with 832 or more CRC error events, or one or more
OOF events.
Bursty Errored Seconds Out-
Of-Frame (BES)
A BES is a second with 2 to 831 CRC error events.
Current Loss of Frame
Counter (LOFC)
The loss of frame (LOF) counter counts the loss of frame alignment
events.
Current Slip Second Counter
(CSS)
A CSS is a second with one or more controlled slip events.
Degraded Minutes (DM) The total number of degraded minutes in the current 24-hour interval.
A degraded minute is a minute in which the bit error rate (BER)
exceeded 1x10-6. This number is updated every minute.