IPmux-16 Installation and Operation Manual Chapter 3 Operation
Configuring IPmux-16 3-41
Table 3-3. Alarms and Statistics (Cont.) Alarm Failure Comments Valid Modes
FEBE Far End Block Error The number of seconds in which
the FEBE indication is received
from the remote E1 device.
E1 CRC4 mode
BES Bursty Errored Seconds (Errored
Second type B)
The number of seconds with
from two to 319 CRC error
events with no AIS nor SEF
(Framing Bit Errors) error
detection.
Not applicable if Line Type is set
to Unframed
T1-ESF or
E1-CRC4 modes
DM Degraded Minutes A Degraded Minute is calculated
by collecting all of the available
seconds, subtracting any SESs
and sorting the result in 60
second groups.
A Degraded Minute is a 60
second group in which the
cumulative errors during the
60-second interval exceed
1x10-6.
T1-ESF or
E1-CRC4 modes
ES Errored Second: If any error
occurs during one second.
Any second containing the
following error events:
CRC
SEF (OOF)
AIS (T1 only).
If SES is also active (see below)
ES runs for 10 seconds and then
stops (T1 only).