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561221051L1-5, Issue 161221051L1-5A
Severely Errored Seconds (SES) Alarm
The locations shown in Figure 4 are monitored for
Severely Errored Seconds and counts are maintained
for each location. If any of these counts exceed the
SES programmed threshold (see Tables 1 and 2) an
alarm will be generated. This alarm threshold and the
alarm type (minor or major) can be programmed by
setting switches S1 and S2 (Figure 2) to the
appropriate positions according to Tables 1 and 2.
The alarm thresholds are for the 15-minute registers
only, and the 15-minute SES counts are zeroed at each
15-minute boundary. The SES alarm threshold and
alarm type can also be configured in the Craft
interface Options Setup screen (see Figure 11).
Unavailable Seconds (UAS) Alarm
The locations shown in Figure 4 are monitored for
unavailable seconds. Seconds and counts are
maintained for each location. If any of these counts
exceed the UAS programmed threshold (see Tables 1
and 2), an alarm will be generated. This alarm
threshold and the alarm type (major or critical) can be
programmed by setting switches S1 or S2 (Figure 2)
to the appropriate positions according to Tables 1 and
2. The alarm thresholds are for the 15-minute
registers only, and the 15-minute UAS errored second
counts are zeroed at each 15-minute boundary. The
UAS alarm threshold and alarm type can also be
configured in the Craft interface Options Setup screen
(see Figure 11). Note that HDSL2 two wire units only
have Loop 1.
HFAC Alarm Outputs
If an HFAC is present in the shelf, alarm outputs are
available on the backplane wirewrap pins
corresponding to the HFAC slot (see Figure 5).
These outputs are dry contact relay connections and
provide normally open, normally closed and common
connection points for alarm monitoring equipment.
Alarm connection points corresponding to critical
major, and minor alarms (both visible and audible) are
provided. These alarms are generated by the HFAC as
a result of processed data collected from the HTU-Cs /
H2TU-Cs.
Alarm outputs presented on these pins are
programmable and can be provisioned in the HFAC
Options Setup screen (see Options Setup screen), or
using the HFAC dip switch settings (see Tables 1, 2,
and 3). Alarm severity can be provisioned for alarms
Figure 4. ES, SES, and UAS Monitor Locations
ES
DSX-1
ES
DS1
To
Customer
Loop 1
Loop 2
HTU-C
HTU-R
SES
C-1
SES
DSX-1
SES
DS1
Loop 1
Loop 2
HTU-C
HTU-R
UAS
DSX-1
To
Network
Loop 2
HTU-C
HTU-R
UAS
DS1
Errored Seconds Monitor Locations
Severely Errored Seconds Monitor Locations
Unavailable Seconds Monitor Locations
HRE
Loop 1
Loop 2
SES
H-1
SES
H-3
SES
H-4
SES
H-2
HRE
Loop 1
Loop 2
Loop 1
HRE
Loop 1
Loop 2
To
Network
To
Network
To
Customer
To
Customer
UAS
C-1
UAS
C-2
UAS
H-1
UAS
H-3
UAS
H-2
UAS
H-4
UAS
R-1
UAS
R-2
SES
C-2
SES
R-1
SES
R-2
ES
R-1
ES
R-2
ES
H-2
ES
H-4
ES
H-1
ES
H-3
ES
C-1
ES
C-2