User's Manual

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As OEU has a shelf with EWDM in it, the unit makes electronic-optical conversion of TX signals
from ODU and makes optical-electronic conversion of RX signals. In addition, OEU can be
equipped with up to two DOUs. One DOU supports four optical ports and one optical port can
be connected with ROU. With WDM in DOU, the unit can concurrently send/receive two pieces
of wavelength (TX:1310nm, RX:1550nm) through one optical core. DOU has SC/APC of optical
adaptor type.
Figure 5.7 – Optical cable of SC/ACP Type
For optical adaptor, SC/APC type should be used. To prevent the optical access part from being
marred with dirt, it should be covered with a cap during move. When devices are connected
through optical cables, you need to clear them using alcohocol to remove dirt.
5.4.4 Insert DOU to OEU
Into OEU Shelf, up to two DOUs can be inserted. DOU module is in Plug in Play type.
When you insert DOU in OEU, insert the unit into the top DOU1 slot first. You can be careful as
the number is silk printed at the left.
The following figure shows installation diagram of OEU with one DOU inserted in it.
The following figure shows installation diagram of OEU with two DOUs inserted in it.