ADC H2TU-C-388 HiGain, Руководство пользователя

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152-388-115-03, Issue 03 Monitoring System Activity and Performance
H2TU-C-388 List 1E April 21, 2000 39
Table 17. DS1 Alarm Descriptions
Screen Alarm Front-panel Alarm Description
H2TU-C DS1 ALARMS (see Figure 19 on page 38 )
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.
DBER DBER Bit Error Rate—The DS1 BER has exceeded the built-in 24-hour threshold limits of
approximately 10
-6
.
H2TU-R DS1 ALARMS (see Figure 21 on page 40 )
RLOS
(a)
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 (see
Figure 23 on page 45 )
AIS-CI
(b)
is sent towards the network.
(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 Alarm Indication at the H2TU-R - Indicates an RAI alarm (yellow) 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 alarm) 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 DBER Bit Error Rate—The DS1 BER has exceeded the built-in 24-hour threshold limits of
approximately 10
-6
.