ACCULINK 336x E1 NTU
4-8
December 1996
3360-A2-GB20-20
Table 4-4
(1 of 2)
Performance Registers
Register
Interval Description
Totals Description
Event
(Not valid for
Lp
n registers.)
Error events counter. An error event is a frame
with either a Cyclic Redundancy Check (CRC)
error or an Out Of Frame (OOF) event. The
maximum count is 65,535. This register is only
reset as a result of a Clear Performance
Register command. This register is valid for the
current interval only.
N/A
CurTimer
Current interval timer. This register records the
number of seconds in the current 15-minute
interval. The maximum is 900 seconds. This
register is valid for the current interval only.
N/A
VldIntvl
N/A
Valid interval total. Records the number of valid
15-minute intervals in the previous
x hours, where x
is 24 hours for aggregate performance and 8 hours
for port performance. This register is not valid for the
current interval.
ES
The number of errored seconds for the current
interval. An errored second is any second with
one or more of the following: errored frame
alignment, CRC error, Loss of Signal (LOS),
Alarm Indication Signal (AIS), or Loss of Frame
(LOF). The maximum is 900 seconds.
The total number of errored seconds for the previous
x hours, where x is 24 hours for aggregate
performance and 8 hours for port performance.
UAS
The number of unavailable seconds for the
current interval. An unavailable second is any
one second interval when service is
unavailable. (Detection occurs with 10
consecutive unavailable seconds.) The
maximum is 900 seconds.
The total number of unavailable seconds for the
previous
x hours, where x is 24 hours for aggregate
performance and 8 hours for port performance.
SES
The number of severely errored seconds for the
current interval. For E1 or DTE registers, a
severely errored second is any second with 805
or more CRC errors, 16 or more errored frame
alignment signal events, or one or more LOS,
AIS, or OOF event. For port registers, a
severely errored second is any second with 320
or more CRC errors, or one or more OOF
event. For Lp
n registers, a severely errored
second is any second with 50 or more CRC6
errors. The maximum is 900 seconds.
The total number of severely errored seconds for the
previous
x hours, where x is 24 hours for aggregate
performance and 8 hours for port performance.
BES
(Not valid for
Lp
n registers.)
The number of bursty errored seconds for the
current interval. For E1 or DTE registers, a
bursty errored second is any second with more
than one, but less than 805, CRC errors when
in CRC4 mode, or more than one, but less than
16, errored frame alignment signals when in
non-CRC4 mode. For port registers, a bursty
errored second is any second with more than
one, but less that 320, CRC errors. The
maximum is 900 seconds.
The total number of bursty errored seconds for the
previous
x hours, where x is 24 hours for aggregate
performance and 8 hours for port performance.
