Revision 01
June 12, 1997
Section 150-441-124
HiGain HLU-D41
PairGain Engineering - Plant Series
Page 35
22. Alarm History
22.1
Press <G> from the Maintenance Terminal Main Menu to open the Alarm History screen.
The following screen appears:
22.2
The Alarm History screen shows the history of all HiGain system alarms for doubler and non-doubler
configurations. Table 16 lists the Alarm History fields and descriptions.
Table 16. Alarm History Fields and Descriptions
Field
Description
Type
Identifies the type of alarm
LOS, DS1-HRU
First and last instance of LOS at the HRU; Current condition, number of alarms
Span 1 LOSW, HDSL1
First and last instance of LOSW on HDSL1; Current condition, number of alarms
Span-1 ES, HDSL1
First and last instance of ES on HDSL1; Current condition, number of alarms
Span 1 Margin L1
First and last instance of exceeded margin on Loop 1; Current condition, number of alarms
PWR Open
Power condition: Open or Closed
PWR SHRT
Power short condition
Last Cleared: None
Last time Alarm History cleared
22.3
The LOS and PWR system alarms are common to all spans. Only the LOSW, ES and MARGIN are
span-specific alarms. The PWR-OPEN and PWR-SHRT alarms indicate alarm conditions on the
HLU-D41. Neither PWR alarm is available on the other spans. The First and Last columns contain
the time and date stamp of the first and last occurrence of each alarm. The Current column shows
the status of each alarm. The Count column lists the number of times each alarm occurred. The
maximum non-overflowing count is 999.
22.3.1
Span 1.
The Span 1 Screen concerns alarms that occurred on the HDSL loops between the
HLU-D41 and the first doubler (HDU1).
