User Manual

Table Of Contents
Optical Master Unit
PRODUCT DESCRIPTION AND USER’S MANUAL
© Axell Wireless Ltd A1829300 rev H 31 (86)
3.4 Alarm System
The OMU monitors a number of parameters to see that the unit works as intended. Furthermore, the Control
Module constantly polls all the nodes for new alarms. If a new alarm is detected, it is stored in the OMU alarm
log. If the OMU is integrated to the Axell Element Manager, the OMU dials up the AEM using the built in
modem and delivers the alarm.
3.4.1 Alarm Sources
Temperature Related Alarms
Alarm Code Description Trigger
Temperature TEM Measures the temperature in the Control Module. Temperature too high or
too low
Radio Board
Temperature
RBT Measures the temperature on the Rack
Communication Board or Fibre Optic Converter
Temperature too high or
too low
Power Related Alarms
Alarm Code Description Trigger
Power Supply 1 PW1 Measures the +28V generated by the repeater’s
power supply.
Level too high or too
low
Power Supply 2 PW2 Measures the +15V generated by the repeater’s
power supply.
Level too high or too
low
Power Supply 3 PW3 Measures the +6.45 V generated by the repeater’s
power supply
Level too high or too
low
Power Supply 4 PW4 Measures the backed up +6.45 V in rack 1
generated by the repeater’s power supply
Level too high or too
low
Battery Level BAT Measures the power level in the battery Level too high or too
low
Communication Related Alarms
Alarm Code Description Trigger
Communication with
Active Devices
COM Detects errors in the communication between
Control Module and Rack Communication
Board/Fibre Optic Converter
Errors in the
communication
Node
Communication
Status
NCO Detects error in the communication between the
Control Module and slave repeaters
Errors in the
communication
EEPROM CRC
Check In Active
Devices
CRC Controls checksum in Radio Communication
Board and Fibre Optic Converter
Checksum wrong