ADC HDSL4 Screen Alarm Front-PanelDescription H4TU-C DS1 Alarms on, H4TU-R DS1 Alarms on this

Monitoring System Activity and Performance							LTPH-UM-1031-03, Issue 3
				Event Log	Config Inventory Report Rlogon		Help
	Monitor		Performance
				H4TU-R DS1	Alarm History
-----------------------------------------------------------------------------
	Alarm		First		Last	Status	Count
	RLOS					OK	0
	RAIS					OK	0
	RAI					OK	0
	LRAI					OK	0
	PRM-NE					OK	0
	PRM-FE	01/30/02 00:37			01/30/02 00:45	OK	0
	DBER					OK	7
	LOF					OK	0

Press: C(l)ear Alarm History

------------------------------------------------------------------------------

Use <Space>	to cycle through		Interface :	H4TU-R DS1
choices and	<Enter> to	view	Statistics :	Alarm History
ID: xxxx--	xxxx--xxxx--	xxxx	02/01/2002 12:30:01	H4TU-C	System: Alarm

Figure 23. H4TU-R DS1 Alarm History Screen

Table 11. DS1 Alarm Descriptions

Screen Alarm Front-PanelDescription

Alarm

H4TU-C DS1 Alarms (Figure 22 on page 35)

LLOS (a)	LLOS	Line (Unit) Loss of Signal—Loss of the H4TU-C DSX-1 input signal.
LAIS (a)	LAIS	Line Alarm Indication Signal—Indicates an AIS (unframed all ones) pattern is being received at the
		H4TU-C DS1 input port.
DBER	xxx-DBER	Bit Error Rate—The DS1 BER has exceeded the built-in 24-hour threshold limits of approximately
		10-6. (xxx denotes either TUC or TUR.)
LOF	xxx-LOF	Loss of Frame—Indicates the incoming DS1 frame pattern is other than the one selected, ESF or SF,
		by the FRMG option. Only occurs if the FRMG option is set to SF or ESF. (xxx denotes either TUC or
		TUR.)

H4TU-R DS1 Alarms (Figure 23 on this page)

RLOS (b)	RLOS	Remote (Unit) Loss of Signal—Loss of the H4TU-R DS1 input signal.
RAIS	RAIS	Remote Alarm Indication Signal—Indicates an AIS (unframed all ones) pattern is being received at the
		H4TU-R DS1 input port. By default AIS-CI (b)is sent towards the network (see Figure 27 on page 45)
RAI	RRAI	Remote RAI - Remote Alarm Indication at the H4TU-R—Indicates an RAI alarm (yellow) from the CPE
		with errors from the line unit or network.
LRAI	LRAI	Line (Clear) Remote Alarm Indication—An RAI condition is detected at the remote and the signal from
		the line unit is error-free. RAI signal is transmitted towards the network.
PRM-NE	PRMN	Performance Report Messaging - Near End—The count of the PRM-NE register at the H4TU-R
		exceeds the 10-6BER threshold at 648 events since 12:00:00 AM.
PRM-FE	PRMF	Performance Report Messaging - Far End—The count of the PRM-FE register at the H4TU-R exceeds
		the 10-6BER threshold at 648 events since 12:00:00 AM.
DBER	xxx-DBER	Bit Error Rate—The DS1 BER has exceeded the built-in 24-hour threshold limits of approximately
		10-6. (xxx denotes either TUC or TUR.)
LOF	xxx-LOF	Loss of Frame—Indicates the incoming DS1 payload does not contain the specific frame pattern, ESF
		or SF, selected by the FRMG option. Only occurs if the FRMG option is set to SF or ESF. (xxx denotes
		either TUC or TUR.)

(a)This is a DS1-specific alarm that also issues a minor alarm (sent to the management unit or the backplane), if enabled.

(b)AIS-CI is a modified AIS alarm pattern. Equipment not suited to detect AIS-CI still detects this signal as an AIS. AIS-CI is sent toward the network indicating that an LOS (RLOS) or AIS (RAIS) has been received from the CPE.

36 September 12, 2003 H4TU-C-319 List 1