Initializing the Maintenance Terminal Screens
150-402-111-02
36
December 8, 1998
HRU-402 List 1A
A
DDITIONAL
I
NFORMATION
ON
S
ELECTED
O
PTIONS
The following describes additional information on some of the features
included with the HRU-402.
Remote DS-1 Alarm (RDA) Option
The Remote Loss of Signal (RLOS) alarm output at the HLU can be inhibited
by disabling the RDA option. This prevents a LOS condition at the DS-1
input to the HRU-402 from activating a system alarm output at the HLU.
However, the HLU front panel Status LED still flashes red and the ALRM
RLOS message is displayed to alert the user of the LOS state. LOS is sent
towards the network from the HLU. This option prevents the common
occurrences of a CPE LOS condition from generating recurring alarms and
AIS payloads.
Margin Alarm
(ALM)
Threshold
(THRES)
Indicates the settings for the margin alarm thresholds.
Remote (DS-1
LOS) Alarm
(RDA)
Indicates whether a LOS (Loss of Signal) at the HRU DS-1 input
generates an AIS and Alarm, or LOS and no Alarm condition at the HLU.
BPVT
Transparency
Indicates whether the Bipolar Violation Transparency option is Enabled or
Disabled.
Alarm Pattern
(ALMP)
Indicates whether the Alarm Pattern option is set to AIS or LOS.
(a) Settings not available when attached to an HLU-231 List 8D, an HLU-319 List 5D, or an
HLU-388 List 5D.
Table 9.
System Settings Fields and Descriptions (Continued)
Field Description
