Alarm Option For The Digital Loop Carrier Feed; Retiring System Alarms - ADC HiGain H2TU-C-388 List 1E User Manual

Testing
Front-Panel
Alarm
(a)
Message
PRMN Performance Report
Messaging - Near End
PRMF Performance Report
Messaging - Far End
(a) The message, ALRM, displays prior to any alarm message.
(b) When the HDSL2 loop loses sync word (LOSW), a system alarm condition exists. The H2TU-C-388 enters the acquiring
mode, the front panel status LED flashes red, and the ACQ or SIG message displays instead of the ALRM message.

Alarm Option for the Digital Loop Carrier Feed

To improve HiGain HDSL2 compatibility with the switch-to-protect features used in the Digital Loop Carrier
(DLC) feeder applications, the H2TU-C-388 has an Alarm Pattern (ALMP) option that allows you to select either
an AIS or LOS DS1 output payload for the following alarms:
• LOSW on any loop
• DS1 LOS

Retiring System Alarms

To retire a system alarm, press the SEL button and execute an Alarm Cut Off (ACO). An ACO turns the alarm off
and replaces the ALRM message with an ACO message. The second part of the ALRM message, which defines the
cause of the alarm, remains. Both parts of the message remain until the alarm condition clears or another higher
priority alarm occurs.
44
Table 20. Front-Panel System Alarms Summary (Cont.)
Description
H2TU-R PRM-NE BER threshold has been
exceeded.
H2TU-R PRM-FE BER threshold has been
exceeded.
April 21, 2000
152-388-115-03, Issue 03
To Inhibit:
Set DBER threshold to DIS.
Set DBER threshold to DIS.
H2TU-C-388 List 1E