ADC HiGain H2TU-C-202 Manual page 45

LTPH-TP-1005-02, Issue 2
Screen Alarm Description
H2TU-C DS1 ALARMS (see
(a)
LLOS
LAIS
DBER
H2TU-R DS1 ALARMS (see
(a)
RLOS
RAIS
RAI
TX RAI-CI
PRM-NE
PRM-FE
DBER
(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.
H2TU-C-202 List 3E
Table 17. DS1 Alarm Descriptions
Figure 23 on page
Local Loss of Signal—Loss of the H2TU-C DSX-1 input signal.
Line Alarm Indication Signal—Indicates an AIS (all ones) pattern is being received
from the local DS1 input port. The ALMP option determines whether AIS (default) or
LOS is sent towards the CPE.
Bit Error Rate—The DS1 BER has exceeded built-in 24-hour threshold limit of
-6
approximately 10 .
footnote 24 on page
Remote Loss of Signal— Loss of the H2TU-R DS1 input signal.
Remote Alarm Indication Signal—Indicates an AIS (all ones) pattern is being
received at the H2TU-R DS1 input port.The AIS-CI
network (see Figure 28 on page
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.
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.
Performance Report Monitoring - Near End—The count of the PRM-NE register at
-6
the H2TU-R exceeds the 10
Performance Report Monitoring - Far End—The count of the PRM-FE register at the
-6
H2TU-R exceeds the 10 BER threshold at 648 events since 12:00:00 AM.
Bit Error Rate—The DS1 BER has exceeded the built-in 24-hour threshold limits of
-6
approximately 10 .
February 28, 2001
Monitoring System Activity and Performance
36)
36)
(b)
pattern is sent towards the
44).
BER threshold at 648 events since 12:00:00 AM.
37