User's Manual

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5.5.2 BIU Alarms
Item Description
1. MDBU LED LED to show whether MDBU is installed and gets faulty
2. RF Monitor Port
20dB Coupling compared with TX Input Level
20dB Coupling compared with RX Output Level
3. Alarm LED & Reset
Communication state with devices, alarm status of the system and reset
switch
4. NMS(RS-232C)
RS-232C port for communication and diagnosis of devices through
PC/laptop
5. NMS(Ethernet) Ethernet port for upper network
6. Pwr Test Port & ALM Output DC power test port and ALM LED to show abnormal state, if any
7. Power switch Power ON/OFF switch
LED information
Unit LED Indicates
ON Green: MDBU is normally power-supplied.
Green: MDBU is normal.
MDBU
ALM
Red: MDBU is abnormal; check the alarm through RS-232C.
ON Green: MCPU is normally power-supplied.
TXD Green flicker: TX signals are transmitted to communicate with ROU.
RXD Green flicker: RX signals are received from ROU.
Green: BIU system is normal.
MCPU
ALM
Red: BIU system is abnormal; check the alarm through RS-232C.
ON Green: BIU is connected with power and MPSU works normally.
Green: DC output is normal.
MPSU
ALM
Red: DC output is abnormal.