ADTRAN 1200212L1, User Manual

Page: 115 / 172

Chapter 10. Statistics
61200212L1-1 DSU IQ User Manual 10-11
Aborts
Number of frames received without a closing flag. This
transmission error is also reflected in the Discard Frame field.
CRC Errors
Number of frames received with CRC violations. This transmission
error is also reflected in the Discard Frame field.
Octet Align
Number of frames received with a bit count that does not fall on 8-
bit boundaries. This transmission error is also reflected in the
Discard Frame field.
T1 State Change
Count of state changes for the T1 port.
T1 UA Time
Time in seconds the T1 link is down.
Signal Loss
If ALARM is displayed, a loss of signal occurred one or more times
during the given interval.
Telco Test
If ALARM is displayed, a loopback code was received on the T1
interface one or more times during the given interval.
AIS Alarm
If
ALARM
is displayed, unframed all ones were received on the T1
interface one or more times during the given interval. This
indicates that the T1 is out of service.
Red Alarm
If ALARM is displayed, a loss of frame synchronization occurred
one or more times during the given interval.
The next six parameters (Signal Loss, Telco Test, AIS Alarm, Red Alarm,
Yellow Alarm, and PLL Alarm) are events with two states: active and in-
active. If the event occurs one or more times for the given interval, the field
is active and
ALARM is displayed. The first column of the V
IEW BY
I
N
-
TERVAL
menu represents information for the entire current day. There-
fore, once an alarm becomes active, it remains active in the first field for
the entire 24-hour period.