User's Manual

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After turning on the switch of the power supply in ROU, check information on each
module's LED of the system. The table below shows normal/abnormal cases
depending on the status of each module's LED.
Unit LED Indicates
ON Green: ROU is normally power-supplied.
Green: Laser Diode is normal.
LD
Red: Laser Diode is abnormal.
Green: Photo Diode is normal.
PD
Red: Photo Diode is abnormal; check optical cables.
TXD
Green flicker: TX signals are transmitted to communicate with
BIU/OEU.
RXD Green flicker: RX signals are received from BIU/OEU.
Green: ROU system is normal.
RCPU
ALM
Red: ROU system is abnormal; check the alarm through RS-232C.
The power is not supplied.
ON
The power is supplied.
Normal Operation
RDU
ALM
Abnormal Operation
The power is not supplied or the polarity of -48V is reversed.
RPSU ON
The power is supplied.
ID Setting
Use an RS-232 Cable(Direct Cable) for connection with DEBUG port of ROU RCPU. Execute
GUI (Graphic User Interface). When you connect ROU directly with a Serial port, the screen will
show the TREE of a direct line of units connected with ROU. Basic ROU ID is set as ODU1-
DOU1-ROU1. Set it with the ID of a designed ROU. Before setting an ROU ID, you need to
check if ROU is connected with the optical port of ODU or OEU (See System Topology at
"Setting whether to use BIU").