Monitoring System Activity and Performance
LTPH-TP-1001-02, Issue 2
40
February 28, 2001
H2TU-C-388 List 3E
Figure 23.
H2TU-R DS1 Alarm History Screen
Table 17.
DS1 Alarm Descriptions
Screen Alarm
Front-Panel Alarm Description
H2TU-C DS1 ALARMS (see
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
Local Loss of Signal—Loss of the H2TU-C DSX-1 input signal.
LAIS
LAIS
Local Alarm Indication Signal—Indicates an AIS (all ones) pattern is being transmitted
from the local DS1 output port. The ALMP option determines whether AIS (default) or
LOS is sent towards the CPE.
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.)
H2TU-R DS1 ALARMS (see
on this page)
RLOS
RLOS
Remote Loss of Signal— Loss of the H2TU-R DS1 input signal.
RAIS
RAIS
Remote Alarm Indication Signal—Indicates an AIS (all ones) pattern is being received at
the H2TU-R DS1 input port. By default AIS-CI
(b)
is sent towards the network (see
(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.
RAI
RRAI
Remote RAI - Remote Alarm Indication at the H2TU-R—Indicates an RAI alarm (yellow
LED) from the CPE with errors from the line unit or network.
TX RAI-CI
TRCI
Transmit RAI-CI - Remote Alarm Indication at the H2TU-R—Upon reception of an RAI
(yellow LED) from the CPE, the H2TU-R sends a RAI-CI towards the network if the
network signal received at the H2TU-R is clear. If the network signal is impaired (LOS, AIS
or LOF), then the RAI is passed on to the network unaltered. This is applicable to SF or
ESF framing. In an all SF environment, RACI must be enabled to convert SF-RAI to
SF-RAI-CI.
PRM-NE
PRMN
Performance Report Monitoring - Near End—The count of the PRM-NE register at the
H2TU-R exceeds the 10
-6
BER threshold at 648 events since 12:00:00 AM.
PRM-FE
PRMF
Performance Report Monitoring - Far End—The count of the PRM-FE register at the
H2TU-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 TUR.)
Monitor
Performance
Event Log
Config
Inventory
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Rlogon
Help
H2TU-R DS1
Alarm History
-----------------------------------------------------------------------------
Alarm
First
Last
Status
Count
RLOS
OK
0
RAIS
OK
0
RAI
OK
0
TX RAI-CI
OK
0
PRM-NE
OK
0
PRM-FE
OK
0
DBER
02/01/01 00:37
02/01/01 00:45
OK
7
Press: C(l)ear Alarm History
------------------------------------------------------------------------------
Use <Space> to cycle through
Interface
:
H2TU-R DS1
choices and <Enter> to view
Statistics :
Alarm History
ID: xxxx--xxxx--xxxx--xxxx
02/01/2001 12:30:01
H2TU-C
System: Alarm
