User`s guide

5-16 DL3100 User’s Guide—November 1998
5
¥ FS (Failed Seconds)
A Failed Second is the number of seconds after the occurrence of ten
consecutive Severely Errored Seconds (SESs).
Figure 5-9 Current T3MB Statistics Menu - Screen 3
¥ SES (Severely Errored Second)
A Severely Errored Second is a second containing 44 or more CPbit,
AIS, or OOF events.
¥ OOF (Out Of Frame)
An Out Of Frame Second is the number of seconds that the signal has
been out of frame.
¥ LOS (Loss of Signal)
A Loss Of Signal is the number of seconds in which there has been at
least one (LOS) event.
¥ AIS (Alarm Indication Signal)
An Alarm Indication Signal is the number of seconds in which an alarm
condition exists in the network.
¥ BPV (Bipolar Violations)
A Bipolar Violation is the occurrence of two consecutive ÒonesÓ bits of
the same polarity, or an excessive zero (EXZ) event.
Exit