ADC H2TU-C-388 - Manual (Page 40)

Monitoring System Activity and Performance 152-388-100-02, Issue 2
32 June 6, 2000 H2TU-C-388 List 1
Table 11. DS1 Alarm Descriptions
Screen Alarm Front-Panel Alarm Description
H2TU-C DS1 ALARMS ( Figure 21 on page 31 )
LLOS (a)
(a) 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 (a) LAIS Local Alarm Indication Signal—Indicates an AIS (all ones) pattern is transmitted from the
local DS1 output port. The ALMP option determines whether AIS (default) or LOS is sent
towards the CPE.
DBER DBER Bit Error Rate—The DS1 BER has exceeded the built-in 24-hour threshold limits of
approximately 10
-6 .
LOF 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.
H2TU-R DS1 ALARMS ( Figure 22 on page 31 )
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 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 transmitted
from the remote DS1 output port. By default (see
Figure 25 on page 38 ) AIS-CI (b) is sent
towards the network.
RAI RRAI Remote RAI—Indicates an RAI alarm (yellow) from the CPE with errors from the line unit
or network.
LRAI LRAI Line RAI—Indicates an RAI alarm (yellow) from the CPE with an error-free signal from the
line unit or network.
PRM-NE PRMN Performance Report Messaging - 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 Messaging - 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 .
LOF 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.