ADC H2TU-C-231 Alarm History at the HDSL2 Interface

LTPH-UM-1109-01, Issue 1	Monitoring System Activity and Performance

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.

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

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
		10-6or 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.

H2TU-C-231 List 2

January 9, 2002