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LTPH-UM-1109-01, Issue 1 Monitoring System Activity and Performance
H2TU-C-231 List 2 January 9, 2002 35
Alarm History at the HDSL2 Interface
The HDSL2 Alarm History screens report alarms at the H2TU-C and the H2TU-R. Figure 23 shows the H2TU-C
HDSL2 alarm history and Table 12 below describes the alarms that are reported at the H2TU-C-231 or H2TU-R.
Figure 23. H2TU-C HDSL2 Alarm History Screen
Table 12. HDSL2 Alarm Descriptions
Screen Alarm Front-Panel Alarm Description
HDSL2 ALARMS at the H2TU-C and H2TU-R
LOSW LOSW Loss of Sync Word—The HDSL2 loop has lost synchronization.
MAL xxx-MAL Margin—The margin on the HDSL2 loop has dropped below the minimum threshold value
set for the system. (xxx denotes either TUC or TUR.)
LA xxx-LA Loop Attenuation—The attenuation on the HDSL2 loop has exceeded the maximum value
set for the HDSL2 loop attenuation threshold. (xxx denotes either TUC or TUR.)
HBER xxx-HBER Block Error Rate—The HDSL2 BER has exceeded the set threshold limits of
10
-6
or 10
- 7
. (xxx denotes either TUC or TUR.)
HDSL2 ALARMS at the H2TU-C only
SHORT PWR FEED SHRT Indicates a short between the Tip and Ring of the HDSL2 pair.
GND PWR FEED GND The HDSL2 loop is grounded.
OPEN PWR FEED OPEN Indicates a line power open condition.
Monitor Performance Event Log Config Inventory Report Rlogon Help
H2TU-C HDSL2 Alarm History
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Alarm First Last Status Count
LOSW OK 0
MAL OK 0
LA OK 0
HBER 09/01/01 00:37 09/01/01 00:45 OK 7
SHORT OK 0
GND OK 0
OPEN OK 0
Press: C(l)ear Alarm History
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Use <Space> to cycle through Interface : H2TU-C HDSL2
choices and <Enter> to view Statistics : Alarm History
ID: xxxx--xxxx--xxxx--xxxx 09/01/2001 12:30:01 H2TU-C System: Alarm