User's Manual

Confidential & Proprietary 122/136
Basically, one antenna is provided. To install a variety of antennas, you need such
devices as a divider and a coupler. ROU can work with a DC Feeder and an Optic
Cable Feeder. For power supply of ROU, a power supply in AC-DC and DC-DC type is
provided to let you select a power supply suitable for an application.
For upper level, ROU can be connected with ODU and OEU. It has AGC function for 5dBo of
optical cable loss.
The following show operational procedures after installation of ROU.
Checking the status of ROU's LED Indicator
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
RCPU
ON Green: ROU is normally power-supplied.
LD
Green: Laser Diode is normal.
Red: Laser Diode is abnormal.
PD
Green: Photo Diode is normal.
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.
ALM
Green: ROU system is normal.
Red: ROU system is abnormal; check the alarm through RS-232C.
RDU
ON
The power is not supplied.
The power is supplied.
ALM
Normal Operation
Abnormal Operation