Terminal Operation 4-7
PRISM 3021
SES (Severely Errored Seconds): This is the number of
one-second periods with 320 or more CRC4 error events or
at least one out of frame event occurred.
LOFC (Loss of Frame Count): An LOFC is the accumula-
tion of the number of times a loss of frame is declared.
CSS (Controlled Slip Seconds): This is the number of one-
second periods in which at least one controlled slip (a repli-
cation or deletion of a E1 frame to the receiving terminal)
occurred.
For generic TR-54016-far-end devices, only the
standard telco 24-hour performance data is dis-
played. 30-day data is not available.
E
NHANCED
24 H
OUR
AND
E
NHANCED
30 D
AY
E
RROR
P
ARAMETERS
Time and Date: The Enhanced 24 Hour screen shows the
time in 15-minute increments. The Enhanced 30 Day screen
shows the date in one-day increments. The real time (or date
on the 30-day screen) of the interval beginning is shown.
Interval: In the Enhanced 24 Hour screen, Interval 1 is the
most recently stored 15-minute interval and interval 96 is
the oldest in the current 24-hour period. On the Enhanced
30 Day screen, interval 30 is the oldest one-day interval in
the currnet 30-day period.
CRCES (CRC Errored Seconds): The is the number of
one-second periods in which at least one CRC error
occurred.
OOFS (Out of Frame Seconds): The number of one-sec-
ond periods in which a frame sync loss occurred.
LOSS (Loss of Signal Seconds): The number of one-sec-
ond periods in which the E1 received signal was interrupted.
AISS (Alarm Indication Signal Seconds): This is the num-
ber of one-second periods in which an all-1s signal is
received.
RAS (Remote Alarm Seconds): This is the number of sec-
onds generated by the terminal equipment when an
improper signal is received from the facility or upon receipt
of unframed all-1s.
BPVS (Bipolar Violation Seconds): This is the number of
one-second periods in which at least one bipolar violation
occurred.
