Testing
152-388-115-03, Issue 03
44
April 21, 2000
H2TU-C-388 List 1E
Alarm Option for the Digital Loop Carrier Feed
To improve HiGain HDSL2 compatibility with the switch-to-protect features used in the Digital Loop Carrier
(DLC) feeder applications, the H2TU-C-388 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
•
DS1 LOS
Retiring System Alarms
To retire a system alarm, press the SEL button and execute an Alarm Cut Off (ACO). An ACO turns the alarm off
and replaces the
ALRM
message with an
ACO
message. The second part of the
ALRM
message, which defines the
cause of the alarm, remains. Both parts of the message remain until the alarm condition clears or another higher
priority alarm occurs.
PRMN
Performance Report
Messaging - Near End
H2TU-R PRM-NE BER threshold has been
exceeded.
Set DBER threshold to DIS.
PRMF
Performance Report
Messaging - Far End
H2TU-R PRM-FE BER threshold has been
exceeded.
Set DBER threshold to DIS.
(a) The message, ALRM, displays prior to any alarm message.
(b) When the HDSL2 loop loses sync word (LOSW), a system alarm condition exists. The H2TU-C-388 enters the acquiring
mode, the front panel status LED flashes red, and the ACQ or SIG message displays instead of the ALRM message.
Table 20.
Front-Panel System Alarms Summary (Cont.)
Front-Panel
Message
(a)
Alarm
Description
To Inhibit:
