Nera Evolution Series Technical Description page 17

Plug-in units:
- The lower left position contains the Supervisory Unit. The Supervisory Unit is handling the
configuration of all system units as well as reporting system status to the EM/NMS system. One of
the LAN-ports on the Supervisory Unit may be used for Ethernet User traffic.
- The rightmost position houses the FAN Unit, handling the ventilation and temperature management
of the IFU frame. The FAN Unit is always included with the IFU basic frame. The LED on the FAN
Unit is an alarm for the IFU basic frame.
- The Line Interface slots houses the various optional user traffic interfaces.
- The two Radio Interface slots houses Radio Interface Units (RIUs) or Power Supply Units. The RIU
provides connection to the ODU and includes power supply to the unit and the ODU.
- The upper Aux/Serv. slots houses any Auxiliary or Service Channel units, such as Alarm and Control
Unit, Wayside Unit, 64 kb Data Channels Unit and EOW Unit. Up to three slots are available, limited
by double height Line Interface Units or DXC (used with STM-1/OC-3-interface).
All units can be replaced in the field. Non traffic carrying units can be replaced without interrupting the
service. See paragraph 2.3 for further description of the various plug-in units.
NGP\00329 Rev. C 23-06-2006 Evolution Series - XPAND 15