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Monitoring System Activity and Performance LTPH-UM-1031-03, Issue 3
36 September 12, 2003 H4TU-C-319 List 1
Figure 23. H4TU-R DS1 Alarm History Screen
Table 11. DS1 Alarm Descriptions
Screen Alarm
Front-Panel
Alarm
Description
H4TU-C DS1 Alarms (Figure 22 on page 35)
LLOS
(a)
(a) This is a DS1-specific alarm that also issues a minor alarm (sent to the management unit or the backplane), if enabled.
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)
(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.
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
-6
BER 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
-6
BER 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.)
M
onitor Performance Event Log Config Inventory Report Rlogon Help
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 OK 0
DBER 01/30/02 00:37 01/30/02 00:45 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