ADC Telecommunications Inc. DLC1904B Manual De Usuario
ADCP-75-126 • Issue B • April 2002 • Section 5: Maintenance
Page 5-2
©
©
2002, ADC Telecommunications, Inc.
• Battery
maintenance tools (see PRC-SERIES OPERATING AND FIELD SERVICE
MANUAL
for tool recommendations)
2
FAULT DETECTION AND ALARM REPORTING
The
Digivance LRCS on-board embedded software detects various unit and system faults and
reports
them as either Major or Minor alarms. A Major alarm indicates that the system has
failed
in a way that directly affects RF transport performance. This usually means that some
calls
or perhaps all calls cannot be made over the system. A Minor alarm means that system
performance
is not affected or in some cases, that the performance may no longer be optimal.
Four
types of faults cause a minor alarm to be reported: overtemperature, fan failure, diversity
path
failure, and an external minor fault (user defined fault). All other faults are reported as a
Major
alarm.
Reporting
of Major and Minor alarms is accomplished through the HU alarm contacts, the unit
front
panel LED’s, the EMS software Graphical User Interface (GUI), and the Network
Operations
Center - Network Element Manager (NOC/NEM) interface.
The
HU is equipped with a set of both normally open (NO) and normally closed (NC) alarm
contacts
which are used to report both Major and Minor alarms to an external alarm system. The
alarm
contacts summarize the inputs so that any Major or Minor alarm will trigger an alarm
report
to the external alarm system.
The
HU, STM, and LPA front panel LED indicators are used to report specific alarms which are
reflected
in the LED colors: Green, Red, Yellow, and Off. In addition to LED indicators, the
LPA
is also equipped with a Digital Display that provides status messages. A description of the
Host
Unit, Spectrum Transport Module, and Linear Power Amplifier LED indicators is
provided
and
The
EMS software GUI provides both a summary and a more detailed list of alarm information
that
includes unit and module level faults, circuit faults, and measured value faults such as
voltages,
RF power, and temperature. A summary showing a list of all systems and their current
alarm
status is presented through the Alarm OverView display. A detailed list of alarm
information
is presented through the HOST alarm display and the REMOTE alarm display. All
the
inputs that the system reports as alarms are shown in the HOST and REMOTE alarm
displays.
The
NOC/NEM interface provides the same summary and detailed list of alarm information as
the
EMS software GUI but in an ASCII text string format. Sending the command GET
ALARMSUMMARY
produces a list of all systems and their current alarm status. Sending the
command
GET ALARM ALL for a specific system will produce a detailed list of alarm
information
for the specified system.