User's Manual

Confidential & Proprietary 130/139
6.3 OEU Operation
The figure below shows the level of the system link of SMDR-NH124 (BIU-ODU-OEU-ROU).
This section describes OEU-related information. OEU receives various signals through optical
modules. The optical signals are converted to RF signal and the RF signal also is amplified to
moderate signal level. To transmit to ROU, the signal is converted to optical signal
6.3.1 OEU Operation
OEU is in shelf enclosure type. OEU is located at a remote closet in a building. And it
can be installed into a rack.
OEU is for role as hub. It is to expand toward campus cluster, it is only one optical
cable to expand 8ROU.This is reason why OEU supports up to 2DOU. The DOU
supports up to 4optical port to connect ROU
ROU can work with a DC Feeder and an Optic Cable Feeder. For power supply of OEU,
a power supply in DC-DC type is provided
For upper level, OEU can be connected with ODU. It has AGC function for 5dBo of
optical cable loss. The following show operational procedures after installation of OEU.
Checking the status of OEU's LED Indicator
After turning on the switch of the power supply in OEU, check information on each