ADTRAN 1200275L1, User Manual

Page: 125 / 198

Chapter 10. Statistics
61200275L1-1 TSU IQ+ User Manual 10-13
CRC Errors
Number of frames received with CRC violations. This transmission
error is also reflected in the
D
ISCARD
F
RAME
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
D
ISCARD
F
RAME
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 A
LARM
is displayed, a loss of signal occurred one or more times
during the given interval.
Telco Test
If A
LARM
is displayed, a loopback code was received on the T1
interface one or more times during the given interval.
AIS Alarm
If A
LARM
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 A
LARM
is displayed, a loss of frame synchronization occurred one
or more times during the given interval.
The next six parameters ( S
IGNAL
L
OSS
, T
ELCO
T
EST
, AIS A
LARM
, R
ED
A
LARM
, Y
ELLOW
A
LARM
, and PLL A
LARM
) are events with two states:
active and inactive. If the event occurs one or more times for the given
interval, the field is active and
A
LARM
is displayed. The first column of
the V
IEW BY
I
NTERVAL
menu represents information for the entire cur-
rent day. Therefore, once an alarm becomes active, it remains active in the
first field for the entire 24-hour period.