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Testing
Table 16. System Alarms Displayed on Alarm History Screens (Continued)
Message on Screen
Alarm
PRM-NE
Performance Report
Messaging - Near End
PRM-FE
Performance Report
Messaging - Far End
HBER-LP1 or
HDSL4 Block Error Rate
(a)
HBER-LP2
MAL-LP1 or
Margin Alarm
(a)
MAL-LP2
LA-LP1 or
Loop Attenuation
LA-LP2
(a)
(a) Only these alarms assert the System Alarm bus on pin H of the card-edge connector, if the ALM option is set to enabled.
Alarm Option for Digital Loop Carrier (DLC) Feed
To improve compatibility with the switch-to-protect features used in DLC feeder applications, the H4TU-C-231
List 5A has an Alarm Pattern (ALMP) option that allows you to select either an AIS or LOS DS1 output payload
for the following alarms:
•
LOSW on any loop
•
LOS DS1
40
Description
H4TU-R PRM-NE BER threshold has been
exceeded.
H4TU-R PRM-FE BER threshold has been
exceeded.
The BER on Loop 1 or Loop 2 has exceeded the set
-6
- 7
threshold limits of 10
or 10
The margin on HDSL4 Loop 1 or Loop 2 has dropped
below the minimum threshold value set for the
system.
The attenuation on Loop 1 or Loop 2 has exceeded
the maximum value set for the HDSL4 loop
attenuation threshold.
October 15, 2003
LTPH-UM-1253-01
To Enable:
Set DBER threshold to
ENA.
Set DBER threshold to
ENA.
Select 1E-6 or 1E-7 for
.
the HBER system
option.
User selectable; set the
Margin Alarm
Threshold option to >0.
User selectable; set the
HDSL4 Loop
Attenuation Threshold
option to >0.
H4TU-C-231 List 5AA
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